Anthropic vs Google Gemini API
SEPT 2026 auditA comparison of Anthropic and Google Gemini API built from values read directly from each provider's own documentation, with the source recorded against every figure.
The short answer
Choose Anthropic if…
Teams that want the full 1M-token window at the standard per-token rate rather than a long-context surcharge, and that can use caching and batch to cut a frontier-model bill roughly in half.
Editorial · Palash Bagchi · approved
Choose Google Gemini API if…
Getting to a working prototype without a card, then staying on the cheapest frontier-adjacent rates in this set — $0.75 per million input tokens is well under half what Anthropic and OpenAI charge for their top models.
Editorial · Palash Bagchi · approved
Consider something else if…
- Anthropic: Its cheapest model is $1 per million input tokens, several times what the budget tiers at Google, OpenAI and DeepSeek charge, so high-volume simple work is priced against you.
- Google Gemini API: The rates are dated: they roughly double on 1 January 2027, free-tier content is used to improve Google's products, and rate limits are not published anywhere you can read before signing up.
16 sourced criteria separate them — see where, with sources, below.
Pick the criteria you care about. The chart counts how many of them lean toward each provider — the same read as scanning the bars below, just totalled for the ones you chose.
Anthropic 0
Google Gemini API 0
At a glance.
| Criterion | Anthropic | Google Gemini API |
|---|---|---|
| Pricing | ||
| Free tier | No | Yes |
| Kind of free offer | Free credit | Free tier |
| Pricing model | Per million tokens, priced separately for input and output and per model, with multipliers stacked on top: prompt caching, a 50% batch discount, a 1.1x uplift for US-only inference on Claude 4.6 and later, and a fast-mode premium. | Per million tokens, with dated price changes published in advance — the current Gemini 3.x rates are explicitly promotional through 31 December 2026 and roughly double on 1 January 2027. A free tier exists, and its content is used to improve Google's products where the paid tier's is not. |
| Infrastructure | ||
| Regions | Two inference geos on the Claude API: "global" (the default, any available geography) and "us" (US-based infrastructure only, priced at 1.1x on Claude 4.6 and later). Workspace storage geo is "us" only. | Google publishes availability as a country list rather than deployment regions: the Gemini API and Google AI Studio are listed as available in 230 countries and territories, counted from the page's own list, which publishes no total. Country and territory availability for access, not a choice of data region. |
| Inference | ||
| Input price, top model | $10 per million input tokens for Claude Fable 5.1, the most capable model. | $0.75 per million input tokens for Gemini 3.8 Flash through 31 December 2026, then $1.50. Gemini 3.1 Pro, still preview, is $2.00 for prompts up to 200k tokens and $4.00 above. |
| Output price, top model | $50 per million output tokens for Claude Fable 5.1. | $3.75 per million output tokens for Gemini 3.8 Flash through 31 December 2026, then $7.50. Thinking tokens are billed as output. |
| Input price, cheapest model | $1 per million input tokens for Claude Haiku 4.5, the cheapest current model. | $0.30 per million input tokens for Gemini 3.5 Flash-Lite, with output at $2.50. |
| Context window | 1M tokens on Claude Fable 5.1, Claude Opus 5 and Claude Sonnet 5; 200K on Claude Haiku 4.5. | 1,048,576 tokens for Gemini 3.8 Flash. Read from the Vertex AI model card: the Gemini API docs build their model cards client-side and publish no figure a fetch can read. |
| Max output tokens | 128K tokens on the top three models, 64K on Claude Haiku 4.5. | 65,536 tokens for Gemini 3.8 Flash, and Google counts thinking tokens as output. |
| Prompt caching | Supported — Priced separately: 5-minute and 1-hour cache writes, with cheaper cache hits and refreshes. | Supported |
| Batch discount | 50% off both input and output tokens through the Batch API, for asynchronous processing. | 50% off through the Batch API, which is a paid-tier feature. |
| Rate limits | Per-organization limits set by usage tier (Start, Build, Scale, Custom). On the Start tier the Messages API allows 1,000 RPM with 2,000,000 input and 400,000 output tokens per minute for Claude Opus 5, Sonnet 5 and Haiku 4.5, under a $500/month spend cap. | Tied to a usage tier — Free, then Tier 1/2/3 unlocked by cumulative spend — and enforced as requests per minute, input tokens per minute and requests per day. Google publishes no numbers in the docs: limits are viewed in AI Studio and are stated not to be guaranteed. |
| Compliance | ||
| ISO 27001 | ISO 27001:2022 certified, with an ISO 27001 Certificate (2025) and an ISO/IEC 42001:2023 certificate listed in the Trust Center. | Google commits to maintain ISO/IEC 27001:2013 certification for the Processor Services, which include Gemini API Paid Services. Contractual commitment in the DPA the Gemini API terms incorporate, not a Gemini-specific ISO certificate. |
| GDPR / data residency | Inference geo is chosen per request ("global" or "us"); workspace data-at-rest geo is fixed at creation and "us" is currently the only option. | Processed under Google's Data Processing Addendum on the paid tier; abuse-detection logs may be stored or cached in any country where Google has facilities. Scope: the logs Google keeps for Paid Services to detect Prohibited Use Policy violations. |
| Encryption at rest | Workspace data is encrypted at rest under Anthropic's default encryption; an opt-in customer-managed key can replace it. | Google security policies mandate encryption at rest for all user data; personal data is encrypted at the storage level, generally using AES256. From the processor DPA that the Gemini API Additional Terms incorporate for Paid Services. |
| Role-based access control | Claude Enterprise members hold one of five organization roles, plus custom roles attached to groups; the Admin API reads groups and custom roles. | The only IAM role published for the Gemini API is a service agent role for GCS reads; the reference states there are no IAM permissions for the service. |
| Dedicated infrastructure | Priority Tier capacity commitments are no longer sold; existing ones run to their contract end date and guaranteed capacity goes through sales. | Provisioned throughput is offered as optional access on the Enterprise tier, which the pricing page says is powered by Gemini Enterprise Agent Platform. |
Where they differ.
Free tier
- Anthropic
- No
- Google Gemini API
- Yes
Sources (2) →Sources ↓
- Pricing - Claude Platform Docs ↗
“Are there free tiers or trials? [...] New users receive a small amount of free credits to test the API. Contact sales for information about extended trials for enterprise evaluation.”
Read 2026-09-13 · official pricing · Report a correction
- Gemini Developer API Pricing ↗
“Free input & output tokens [...] Limited access to certain models [...] Google AI Studio access [...] Content used to improve our products [...] Get started for Free”
Read 2026-09-06 · official pricing · Report a correction
Kind of free offer
- Anthropic
- Free credit
- Google Gemini API
- Free tier
Sources (2) →Sources ↓
- Pricing - Claude Platform Docs ↗
“Are there free tiers or trials? [...] New users receive a small amount of free credits to test the API. Contact sales for information about extended trials for enterprise evaluation.”
Read 2026-09-13 · official pricing · Report a correction
- Gemini Developer API Pricing ↗
“Free input & output tokens [...] Limited access to certain models [...] Google AI Studio access [...] Content used to improve our products [...] Get started for Free”
Read 2026-09-06 · official pricing · Report a correction
Pricing model
- Anthropic
- Per million tokens, priced separately for input and output and per model, with multipliers stacked on top: prompt caching, a 50% batch discount, a 1.1x uplift for US-only inference on Claude 4.6 and later, and a fast-mode premium.
- Google Gemini API
- Per million tokens, with dated price changes published in advance — the current Gemini 3.x rates are explicitly promotional through 31 December 2026 and roughly double on 1 January 2027. A free tier exists, and its content is used to improve Google's products where the paid tier's is not.
Sources (2) →Sources ↓
- Pricing — Claude Docs ↗
“This page provides detailed pricing information for Anthropic's models and features. All prices are in USD. [...] These multipliers stack with other pricing modifiers, including the Batch API discount and data residency. [...] specifying US-only inference through the inference_geo parameter incurs a 1.1x multiplier on all token pricing categories”
Read 2026-09-06 · official pricing · Report a correction
- Gemini Developer API Pricing ↗
“Paid Tier, per 1M tokens in USD [...] $0.75 through December 31, 2026. $1.50 starting January 1, 2027. [...] Used to improve our products | Yes | No”
Read 2026-09-06 · official pricing · Report a correction
Regions
- Anthropic
- Two inference geos on the Claude API: "global" (the default, any available geography) and "us" (US-based infrastructure only, priced at 1.1x on Claude 4.6 and later). Workspace storage geo is "us" only.
- Google Gemini API
- Google publishes availability as a country list rather than deployment regions: the Gemini API and Google AI Studio are listed as available in 230 countries and territories, counted from the page's own list, which publishes no total. Country and territory availability for access, not a choice of data region.
Sources (2) →Sources ↓
- Data residency - Claude Platform Docs ↗
“Default. Inference may run in any available geography for optimal performance and availability. [...] Inference runs only in US-based infrastructure. [...] is the only available workspace geo.”
Read 2026-09-13 · official docs · Report a correction
- Available regions for Google AI Studio and Gemini API | Google AI for Developers ↗
“The Gemini API and Google AI Studio are available in the following countries and territories.”
Read 2026-09-13 · official docs · Report a correction
Input price, top model
- Anthropic
- $10 per million input tokens for Claude Fable 5.1, the most capable model.
- Google Gemini API
- $0.75 per million input tokens for Gemini 3.8 Flash through 31 December 2026, then $1.50. Gemini 3.1 Pro, still preview, is $2.00 for prompts up to 200k tokens and $4.00 above.
Sources (2) →Sources ↓
- Pricing — Claude Docs ↗
“Model Base input tokens 5m cache writes 1h cache writes Cache hits and refreshes Output tokens Claude Fable 5.1 $10 / MTok $12.50 / MTok $20 / MTok $0.25 / MTok 1 $50 / MTok”
Read 2026-09-14 · official pricing · Report a correction
- Gemini Developer API Pricing ↗
“Gemini 3.8 Flash [...] Input price | Free of charge | $0.75 through December 31, 2026. $1.50 starting January 1, 2027. [...] Gemini 3.1 Pro Preview [...] Input price | Not available | $2.00, prompts <= 200k tokens $4.00, prompts > 200k tokens”
Read 2026-09-06 · official pricing · Report a correction
Output price, top model
- Anthropic
- $50 per million output tokens for Claude Fable 5.1.
- Google Gemini API
- $3.75 per million output tokens for Gemini 3.8 Flash through 31 December 2026, then $7.50. Thinking tokens are billed as output.
Sources (2) →Sources ↓
- Pricing — Claude Docs ↗
“Model Base input tokens 5m cache writes 1h cache writes Cache hits and refreshes Output tokens Claude Fable 5.1 $10 / MTok $12.50 / MTok $20 / MTok $0.25 / MTok 1 $50 / MTok”
Read 2026-09-14 · official pricing · Report a correction
- Gemini Developer API Pricing ↗
“Output price (including thinking tokens) | Free of charge | $3.75 through December 31, 2026. $7.50 starting January 1, 2027.”
Read 2026-09-06 · official pricing · Report a correction
Input price, cheapest model
- Anthropic
- $1 per million input tokens for Claude Haiku 4.5, the cheapest current model.
- Google Gemini API
- $0.30 per million input tokens for Gemini 3.5 Flash-Lite, with output at $2.50.
Sources (2) →Sources ↓
- Pricing — Claude Docs ↗
“Claude Haiku 4.5 $1 / MTok $1.25 / MTok $2 / MTok $0.10 / MTok $5 / MTok”
Read 2026-09-14 · official pricing · Report a correction
- Gemini Developer API Pricing ↗
“Gemini 3.5 Flash-Lite [...] Input price | Free of charge | $0.30 (text / image / video / audio) Output price (including thinking tokens) | Free of charge | $2.50”
Read 2026-09-06 · official pricing · Report a correction
Context window
1M tokens on Claude Fable 5.1, Claude Opus 5 and Claude Sonnet 5; 200K on Claude Haiku 4.5.
1,048,576 tokens for Gemini 3.8 Flash. Read from the Vertex AI model card: the Gemini API docs build their model cards client-side and publish no figure a fetch can read.
Sources (2) →Sources ↓
- Models overview — Claude Docs ↗
“Context window 1M tokens 1M tokens 1M tokens 200K tokens Max output 128K tokens 128K tokens 128K tokens 64K tokens”
Read 2026-09-14 · official docs · Report a correction
- Gemini 3.8 Flash — Vertex AI model card, Google Cloud ↗
“Token limits Context window 1,048,576 Maximum output tokens 65,536”
Read 2026-09-06 · official docs · Report a correction
Max output tokens
128K tokens on the top three models, 64K on Claude Haiku 4.5.
65,536 tokens for Gemini 3.8 Flash, and Google counts thinking tokens as output.
Sources (2) →Sources ↓
- Models overview — Claude Docs ↗
“Context window 1M tokens 1M tokens 1M tokens 200K tokens Max output 128K tokens 128K tokens 128K tokens 64K tokens”
Read 2026-09-14 · official docs · Report a correction
- Gemini 3.8 Flash — Vertex AI model card, Google Cloud ↗
“Token limits Context window 1,048,576 Maximum output tokens 65,536”
Read 2026-09-06 · official docs · Report a correction
Batch discount
- Anthropic
- 50% off both input and output tokens through the Batch API, for asynchronous processing.
- Google Gemini API
- 50% off through the Batch API, which is a paid-tier feature.
Sources (2) →Sources ↓
- Pricing — Claude Docs ↗
“The Batch API allows asynchronous processing of large volumes of requests with a 50% discount on both input and output tokens.”
Read 2026-09-06 · official pricing · Report a correction
- Gemini Developer API Pricing ↗
“Batch API (50% cost reduction) [...] Access to Context caching”
Read 2026-09-06 · official pricing · Report a correction
Rate limits
- Anthropic
- Per-organization limits set by usage tier (Start, Build, Scale, Custom). On the Start tier the Messages API allows 1,000 RPM with 2,000,000 input and 400,000 output tokens per minute for Claude Opus 5, Sonnet 5 and Haiku 4.5, under a $500/month spend cap.
- Google Gemini API
- Tied to a usage tier — Free, then Tier 1/2/3 unlocked by cumulative spend — and enforced as requests per minute, input tokens per minute and requests per day. Google publishes no numbers in the docs: limits are viewed in AI Studio and are stated not to be guaranteed.
Sources (2) →Sources ↓
- Rate limits - Claude Platform Docs ↗
“The rate limits for the Messages API are measured in requests per minute (RPM), input tokens per minute (ITPM), and output tokens per minute (OTPM) for each model class. [...] Claude Opus 5 1,000 2,000,000 400,000 [...] Usage tier Monthly spend cap Start $500 USD Build $1,000 USD Scale $200,000 USD”
Read 2026-09-13 · official docs · Report a correction
- Rate limits — Gemini API ↗
“Rate limits depend on a variety of factors (such as your usage tier) and can be viewed in Google AI Studio. [...] Specified rate limits are not guaranteed and actual capacity may vary. [...] Usage tier | Qualification | Billing tier cap Free | Active project or free trial | N/A Tier 1 | Set up and link an active billing account | $250”
Read 2026-09-06 · official docs · Report a correction
ISO 27001
- Anthropic
- ISO 27001:2022 certified, with an ISO 27001 Certificate (2025) and an ISO/IEC 42001:2023 certificate listed in the Trust Center.
- Google Gemini API
- Google commits to maintain ISO/IEC 27001:2013 certification for the Processor Services, which include Gemini API Paid Services. Contractual commitment in the DPA the Gemini API terms incorporate, not a Gemini-specific ISO certificate.
Sources (2) →Sources ↓
- Anthropic Trust Center ↗
“Compliance HIPAA SOC 2 Type II ISO 27001:2022 ISO/IEC 42001:2023 [...] [Anthropic] ISO 27001 Certificate (2025).pdf”
Read 2026-09-13 · official site · Report a correction
- Data Processing Addendum for Products Where Google is a Data Processor ↗
“means ISO/IEC 27001:2013 certification or a comparable certification for the Processor Services. [...] 7.4 Security Certification. To evaluate and help ensure the continued effectiveness of the Security Measures, Google will maintain the ISO 27001 Certification or other appropriate measures to demonstrate the effectiveness of the Security Measures.”
Read 2026-09-13 · official site · Report a correction
GDPR / data residency
- Anthropic
- Inference geo is chosen per request ("global" or "us"); workspace data-at-rest geo is fixed at creation and "us" is currently the only option.
- Google Gemini API
- Processed under Google's Data Processing Addendum on the paid tier; abuse-detection logs may be stored or cached in any country where Google has facilities. Scope: the logs Google keeps for Paid Services to detect Prohibited Use Policy violations.
Sources (2) →Sources ↓
- Data residency - Claude Platform Docs ↗
“inference geo: controls where model inference runs, on a per-request basis [...] Workspace geo is set when you create a workspace and can [...] is the only available workspace geo.”
Read 2026-09-13 · official docs · Report a correction
- Gemini API Additional Terms of Service | Google AI for Developers ↗
“will process your prompts and responses in accordance with the Data Processing Addendum for Products Where Google is a Data Processor [...] This data may be stored transiently or cached in any country in which Google or its agents maintain facilities.”
Read 2026-09-13 · official site · Report a correction
Encryption at rest
- Anthropic
- Workspace data is encrypted at rest under Anthropic's default encryption; an opt-in customer-managed key can replace it.
- Google Gemini API
- Google security policies mandate encryption at rest for all user data; personal data is encrypted at the storage level, generally using AES256. From the processor DPA that the Gemini API Additional Terms incorporate for Paid Services.
Sources (2) →Sources ↓
- Customer-managed encryption keys - Claude Platform Docs ↗
“have Anthropic use it to encrypt certain workspace data at rest [...] Eligible organizations can opt in to use customer-managed encryption keys instead of the default encryption that Anthropic provides.”
Read 2026-09-13 · official docs · Report a correction
- Data Processing Addendum for Products Where Google is a Data Processor ↗
“Google's security policies mandate encryption at rest for all user data, including personal data. [...] All personal data is encrypted at the storage level, generally using AES256.”
Read 2026-09-13 · official site · Report a correction
Role-based access control
- Anthropic
- Claude Enterprise members hold one of five organization roles, plus custom roles attached to groups; the Admin API reads groups and custom roles.
- Google Gemini API
- The only IAM role published for the Gemini API is a service agent role for GCS reads; the reference states there are no IAM permissions for the service.
Sources (2) →Sources ↓
- User management - Claude Platform Docs ↗
“Groups connect members to custom roles (role-based access control, the RBAC in the endpoint paths and scope names) [...] Every member has exactly one organization role. Reads return the member”
Read 2026-09-13 · official docs · Report a correction
- Gemini API roles and permissions | Identity and Access Management (IAM) | Google Cloud Documentation ↗
“Gemini API offers the following service agent roles. [...] There are no IAM permissions for this service.”
Read 2026-09-13 · official docs · Report a correction
Dedicated infrastructure
- Anthropic
- Priority Tier capacity commitments are no longer sold; existing ones run to their contract end date and guaranteed capacity goes through sales.
- Google Gemini API
- Provisioned throughput is offered as optional access on the Enterprise tier, which the pricing page says is powered by Gemini Enterprise Agent Platform.
Sources (2) →Sources ↓
- Service tiers - Claude Platform Docs ↗
“Priority Tier capacity commitments are no longer available for purchase. Organizations with an existing commitment can continue to use Priority Tier through their contract end date”
Read 2026-09-13 · official docs · Report a correction
- Gemini Developer API pricing | Gemini API | Google AI for Developers ↗
“For enterprise deployments, powered by Gemini Enterprise Agent Platform [...] All features in Paid, plus optional access to: [...] Provisioned throughput”
Read 2026-09-13 · official pricing · Report a correction
When these numbers change, hear about it. Sources are re-checked monthly; a repricing goes out as a short note.
Documented by only one.
These criteria are published by one provider and not the other. An absence here means we have not found a source, not that the feature is missing — except where we say we read the other provider's own page on a given date and it does not state it. Those rows lean, and the provider can correct them with a link.
Questions this comparison answers.
Free tier: Anthropic or Google Gemini API?
Anthropic: No
Google Gemini API: Yes
Should I choose Anthropic or Google Gemini API?
Pick Anthropic if Teams that want the full 1M-token window at the standard per-token rate rather than a long-context surcharge, and that can use caching and batch to cut a frontier-model bill roughly in half.
Pick Google Gemini API if Getting to a working prototype without a card, then staying on the cheapest frontier-adjacent rates in this set — $0.75 per million input tokens is well under half what Anthropic and OpenAI charge for their top models.
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