How much does Claude Opus 4.1 cost?

Claude Opus 4.1 costs $15.00/M input tokens and $75.00/M output tokens, with separate rates for Cache Read at $1.50/M tokens, Cache Write at $18.75/M tokens, and Cache Write (1h) at $30.00/M tokens.

What is the context length of Claude Opus 4.1?

Claude Opus 4.1 has a 200,000 token context window. It supports up to 32,000 completion tokens.

Does Claude Opus 4.1 support tool calling and structured outputs?

Yes. Claude Opus 4.1 accepts tools and tool_choice for function calling. It does not support response_format, so JSON output is not enforced.

What inputs and outputs does Claude Opus 4.1 support?

Claude Opus 4.1 accepts images, text, and files such as PDFs as input and returns text.

Which providers serve Claude Opus 4.1?

Claude Opus 4.1 is served by 1 provider on OpenRouter: Amazon Bedrock.

What other text models does Anthropic have?

Claude Fable 5.2, Claude Haiku 5.5, Claude Sonnet 5.5 and 12 more are other text models from Anthropic.

When was Claude Opus 4.1 released?

Claude Opus 4.1 was released on August 5, 2025. Its knowledge cutoff is January 31, 2025.

Anthropic: Claude Opus 4.1

anthropic/claude-opus-4.1

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Claude Opus 4.1 is an updated version of Anthropic’s flagship model, offering improved performance in coding, reasoning, and agentic tasks. It achieves 74.5% on SWE-bench Verified and shows notable gains in multi-file code refactoring, debugging precision, and detail-oriented reasoning. The model supports extended thinking up to 64K tokens and is optimized for tasks involving research, data analysis, and tool-assisted reasoning.

Modalities

In / out price

$15 / $75per 1M

Context

200K

Released

Aug 5, 2025

Knowledge cutoff

Jan 2025

Providers

This model is hosted by one provider. OpenRouter forwards every request without routing.

Latency / throughput


	$15.00	$75.00	$1.50	3.04s	14 tok/s	100.00%

Input $15.00Output $75.00
14 tok/s100.00% uptime

Pricing

The average price customers actually pay for this model, next to the prices providers post. Caching and discounts mean the price actually paid is often well below the listed one.

Weighted average

Input

$15.33/M tokens

Output

$75/M tokens

Claude Opus 4.1 — Price history

Price history

No effective price data for this selection

		$15.33	$75.00	4.5%	100.0%

Effective in $15.33Effective out $75.00
Token share
100.0%

Uptime

Uptime is the percentage of the past 3 days that at least one provider was responding to requests. Availability is the percentage of time that inference was successfully served. OpenRouter continuously monitors and uses the next-best provider when one returns an error.

Uptime (3d)

100.00%

Availability (3d)

99.69%

Availability over the last 3 days

Last 72 hours

Availability 99.69%

3 Days Ago2 Days AgoYesterdayNow

Availability over the last 24 hours

OpenRouter Availability

99.67%

When an error occurs in an upstream provider, we can recover by routing to another healthy provider, if your request filters allow it. You can access per-provider uptime data programmatically through the Endpoints API. Learn more about our load balancing and provider routing options.

Benchmarks

Scores on standardized evaluations and this model’s own outputs on shared benchmark prompts. Higher percentages are better — and each rank shows where this model lands among the models evaluated on that source.

Benchmark score summary for Anthropic: Claude Opus 4.1 (Artificial Analysis, Design Arena and Vals AI)
Source	Benchmark	Score
Artificial Analysis	Claude 4.1 Opus (Reasoning) GPQA Diamond	80.9%
Artificial Analysis	Claude 4.1 Opus (Reasoning) HLE	12.5%
Artificial Analysis	Claude 4.1 Opus (Reasoning) IFBench	55.4%
Artificial Analysis	Claude 4.1 Opus (Reasoning) τ²-Bench Telecom	71.4%
Artificial Analysis	Claude 4.1 Opus (Reasoning) AA-LCR	76.0%
Artificial Analysis	Claude 4.1 Opus (Reasoning) CritPt	0.0%
Artificial Analysis	Claude 4.1 Opus (Reasoning) LiveCodeBench	65.4%
Artificial Analysis	Claude 4.1 Opus (Reasoning) Terminal-Bench Hard	34.3%
Artificial Analysis	Claude 4.1 Opus (Reasoning) MMLU-Pro	88.0%
Artificial Analysis	Claude 4.1 Opus (Reasoning) AIME 2025	80.3%
Design Arena	Claude Opus 4.1 Models Arena 3D Elo	1132
Design Arena	Claude Opus 4.1 Models Arena Asciiart Elo	1162
Design Arena	Claude Opus 4.1 Models Arena Code Categories Elo	1154
Design Arena	Claude Opus 4.1 Models Arena Data Visualization Elo	1157
Design Arena	Claude Opus 4.1 Models Arena Game Development Elo	1152
Design Arena	Claude Opus 4.1 Models Arena SVG Elo	1099
Design Arena	Claude Opus 4.1 Models Arena UI Component Elo	1146
Design Arena	Claude Opus 4.1 Models Arena Website Elo	1156
Vals AI	Claude Opus 4.1 (Nonthinking) AIME	44.2%
Vals AI	Claude Opus 4.1 (Nonthinking) Finance Agent v1	46.1%
Vals AI	Claude Opus 4.1 (Nonthinking) GPQA Diamond	70.0%
Vals AI	Claude Opus 4.1 (Nonthinking) IOI v1	12.5%
Vals AI	Claude Opus 4.1 (Nonthinking) LiveCodeBench	64.6%
Vals AI	Claude Opus 4.1 (Nonthinking) LegalBench	83.5%
Vals AI	Claude Opus 4.1 (Nonthinking) MATH 500	93.0%
Vals AI	Claude Opus 4.1 (Nonthinking) MedCode	41.4%
Vals AI	Claude Opus 4.1 (Nonthinking) MedQA	92.5%
Vals AI	Claude Opus 4.1 (Nonthinking) MedScribe	71.8%
Vals AI	Claude Opus 4.1 (Nonthinking) MGSM	94.2%
Vals AI	Claude Opus 4.1 (Nonthinking) MMLU Pro	87.2%
Vals AI	Claude Opus 4.1 (Nonthinking) MMMU Pro	73.7%
Vals AI	Claude Opus 4.1 (Nonthinking) MortgageTax	61.1%
Vals AI	Claude Opus 4.1 (Nonthinking) SAGE v1	31.4%
Vals AI	Claude Opus 4.1 (Nonthinking) TaxEval v2	71.5%

Apps

Public apps that send the most traffic to this model. Good signal for what real production workloads look like — and a hint at which use cases this model is best suited for.

Kilo Code

Kilo Code is an open-source AI coding agent that works across VS Code, JetBrains, and CLI to help developers ship code faster with agentic workflows.

187Mtokens

SillyTavern

SillyTavern is the LLM frontend for power users, a chat interface that connects to any model and gives deep control through character creation, roleplay, and prompt customization.

73.4Mtokens

Chub AI

GenAI for everyone

54.1Mtokens

There are many coding agents, but this one is yours.

47.8Mtokens

Janitor AI

Janitor AI is a chatbot platform where users create and chat with custom AI characters for interactive roleplay, storytelling, and immersive fiction.

42.2Mtokens

Top 5 Apps

3.38M

Rest of OpenRouter

2.33M

Not currently available through EU in-region routing. In-region routing docs

More models from Anthropic

Claude Fable 5.2

Claude Fable 5.2 is Anthropic's most capable model for the most demanding technical work, with gains over Fable 5.1 in coding, reasoning, and vision. In prerelease testing it completed otherwise-infeasible software migrations, designed working electronic devices from scratch, and made progress on open problems in physics and mathematics. It communicates more clearly than earlier Fable models and generates output up to 30% faster than Fable 5.1. Adaptive extended thinking is always on, with reasoning effort levels from low to max (default high) and preserved thinking across turns. Anthropic recommends Opus 5.5 as the daily driver for most coding and knowledge work, with Fable 5.2 for the most ambitious, open-ended problems.

Text1M context$8 / $40

Claude Fable 5.2 (batch)

Text1M context$4 / $20

Claude Haiku 5.5

Claude Haiku 5.5 is Anthropic's small, fast model for high-volume, cost-sensitive work such as summarization, subagents, and browser use. It succeeds Claude Haiku 4.5 with stronger coding, computer use, and knowledge work, and accepts text and image input with a 1M-token context window.

It is the first Haiku model with adjustable effort. Thinking is adaptive and on by default, with effort as the main lever for trading off depth, latency, and cost; it can be turned off at low, medium, and high effort.

Text1M context$0.10 / $0.50

Claude Haiku 5.5 (batch)

Text1M context$0.05 / $0.25

Claude Sonnet 5.5

Claude Sonnet 5.5 is Anthropic's Sonnet-class model for well-scoped everyday work, succeeding Claude Sonnet 5 as a direct upgrade. It is especially strong at building features, fixing bugs, and producing polished documents, slides, and spreadsheets, and it writes and communicates more clearly than its predecessor.

Thinking is always on, so effort is the main lever for trading off depth, latency, and cost, and lower effort settings keep it responsive for everyday agentic loops.

Text1M context$2 / $10

Claude Sonnet 5.5 (batch)

Thinking is always on, so effort is the main lever for trading off depth, latency, and cost, and lower effort settings keep it responsive for everyday agentic loops.

Text1M context$1 / $5

Claude Opus 5.5

Claude Opus 5.5 is Anthropic's flagship model for demanding reasoning, coding, and long-horizon agentic work, succeeding Claude Opus 5. It is particularly strong at multi-step changes in large codebases, code review and bug finding, financial and scientific analysis, and reading dense charts, diagrams, and screenshots, and it is more careful than its predecessor about only stating figures and citing sources it can back up.

The model completes comparable tasks in fewer steps and with fewer tokens than Opus 5, and reports on its work in plainer language, with clear updates on what it did, what it found, and what it needs from the user. Thinking is always adaptive, so effort is the main lever for trading off depth, latency, and cost, and lower effort settings remain effective for latency-sensitive workloads.

Text1M context$4 / $20

Claude Opus 5.5 (batch)

Text1M context$2 / $10

Claude Fable 5.1

Claude Fable 5.1 improves on Claude Fable 5 across the board, with the biggest gains in agentic coding, long-running agentic workflows, and knowledge work: long code refactors, front-end and visual code generation, and finance and analysis tasks in particular. It also tends to be more concise than Fable 5 in its plans and summaries. We recommend testing it as a direct upgrade wherever you use Fable 5 today, and alongside Opus 5 on reasoning-heavy tasks.

Text1M context$10 / $50

Claude Fable 5.1 (batch)

Text1M context$5 / $25

Claude Opus 5

Fast-mode variant of Opus 5 - identical capabilities with higher output speed at 2x pricing relative to regular Opus 5.

Learn more in Anthropic's docs: https://platform.claude.com/docs/en/build-with-claude/fast-mode

Note: As of September 1, 2026, this dedicated fast model is deprecated. Fast mode is now served by the fast service tier endpoint on Claude Opus 5 — request it with service_tier: "fast" or speed: "fast". Requests to this model keep working and are served by the same fast tier capacity, so no action is required, but new integrations should target the regular model. Learn more in our service tier docs: https://openrouter.ai/docs/guides/features/service-tiers

Text1M context

Claude Opus 5

Claude Opus 5 is Anthropic’s flagship model for demanding reasoning, coding, and long-horizon agentic work. It is particularly strong at end-to-end software tasks, code review and bug finding, visual analysis of charts and documents, complex office deliverables, and coordinating parallel subagents.

The model maintains strong instruction following and tool use across extended tasks, while remaining effective at lower effort settings for workloads that prioritize latency and token efficiency.

Text1M context$5 / $25

Claude Opus 5 (batch)

The model maintains strong instruction following and tool use across extended tasks, while remaining effective at lower effort settings for workloads that prioritize latency and token efficiency.

Text1M context$2.50 / $12.50

Claude Sonnet 5

Sonnet 5 is Anthropic's most capable Sonnet-class model, with frontier performance across coding, agents, and professional work. It supports adaptive thinking with selectable reasoning effort levels (low, medium, high, max, and x-high), a 1M-token context window, and text, image, and file inputs. Sonnet 5 uses an updated tokenizer and includes real-time cyber safeguards that block certain high-risk dual-use activities.

Text1M context$2 / $10

Claude Sonnet 5 (batch)

Text1M context$1 / $5

Claude Fable Latest

This model always redirects to the latest model in the Claude Fable family.

Text1M context

Claude Fable 5

Claude Fable 5 is a Mythos-class model from Anthropic, built for autonomous knowledge work and coding. It supports text, image, and file inputs with text output, with reasoning support and a 1M-token context window. It is suited for long-running, complex, and asynchronous tasks that previously required frequent human check-ins.

It is particularly strong at end-to-end work that would otherwise take a person hours, days, or weeks - taking on problems that are long-running, ambiguous, or highly multi-step. It executes well-scoped tasks with few mistakes, automatically self-correcting through verification loops, and ships with robust safeguards.

Text1M context$10 / $50

Claude Fable 5 (batch)

Text1M context$5 / $25

Claude Opus 4.8

Fast-mode variant of Opus 4.8 - identical capabilities with higher output speed at 2x pricing relative to regular Opus 4.8.

Learn more in Anthropic's docs: https://platform.claude.com/docs/en/build-with-claude/fast-mode

Note: As of September 1, 2026, this dedicated fast model is deprecated. Fast mode is now served by the fast service tier endpoint on Claude Opus 4.8 — request it with service_tier: "fast" or speed: "fast". Requests to this model keep working and are served by the same fast tier capacity, so no action is required, but new integrations should target the regular model. Learn more in our service tier docs: https://openrouter.ai/docs/guides/features/service-tiers

Text1M context

Claude Opus 4.8

Claude Opus 4.8 is Anthropic's most capable generally available model in the Opus family. It supports text, image, and file inputs with text output, with reasoning support and a 1M-token context window. It is suited for highly autonomous agents, long-horizon agentic work, knowledge work, and memory-driven tasks where coherence over extended sessions matters.

It is particularly strong on multi-step reasoning, complex coding, and end-to-end project orchestration - large codebases, multi-stage debugging, and long-running asynchronous agent pipelines. Beyond coding, it handles knowledge work such as drafting documents, building presentations, and analyzing data, maintaining quality across very long outputs.

Text1M context$5 / $25

Anthropic: Claude Opus 4.1

Providers