How much does Claude Fable 5 cost?

Claude Fable 5 costs $10.00/M input tokens and $50.00/M output tokens, with separate rates for Cache Read at $1.00/M tokens, Cache Write at $12.50/M tokens, Cache Write (1h) at $20.00/M tokens, and Web Search at $10.00/1K calls.

What is the context length of Claude Fable 5?

Claude Fable 5 has a 1,000,000 token context window. It supports up to 128,000 completion tokens.

Does Claude Fable 5 support tool calling and structured outputs?

Yes. Claude Fable 5 accepts tools and tool_choice for function calling. It also supports structured outputs via a JSON schema in response_format.

What inputs and outputs does Claude Fable 5 support?

Claude Fable 5 accepts text, images, and files such as PDFs as input and returns text.

Which providers serve Claude Fable 5?

Claude Fable 5 is served by 5 providers on OpenRouter: Claude Platform on AWS, Azure, Amazon Bedrock, Google Vertex, and Anthropic. Requests are routed to the best available provider, with automatic failover to the others, and you can pin or exclude providers with provider routing.

When was Claude Fable 5 released?

Claude Fable 5 was released on June 9, 2026.

By using Claude Fable 5, you consent to data retention for purposes of monitoring safe and compliant use of AI. Anthropic's data retention policy does not allow zero data retention. Learn more

Azure, Google Vertex, and Amazon Bedrock endpoints are BYOK-only while we work on enabling public access.

Anthropic: Claude Fable 5

anthropic/claude-fable-5

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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.

Modalities

In / out price

$10 / $50per 1M

Context

1.0M

Released

Jun 9, 2026

Providers

Different companies host the same model. OpenRouter routes your request to one of them based on the routing mode you pick: Balanced (price + speed), Nitro (fastest), or Floor (cheapest).

Latency / throughput


	$10.00	$50.00	$1.00	1.49s	62 tok/s	100.00%
	$10.00	$50.00	$1.00	3.59s	58 tok/s	99.54%
	$10.00	$50.00	$1.00	3.08s	50 tok/s	99.65%
BYOK only	$10.00	$50.00	$1.00	--	--	--
	$10.00	$50.00	$1.00	3.88s	55 tok/s	100.00%
Not used in Standard routing:Why these endpoints are not used
	$11.00	$55.00	$1.10	--	--	100.00%
	$11.00	$55.00	$1.10	--	--	--

Input $10.00Output $50.00
62 tok/s100.00% uptime
Input $10.00Output $50.00
58 tok/s99.54% uptime
Input $10.00Output $50.00
50 tok/s99.65% uptime
Input $10.00Output $50.00
BYOK only
-- tok/s-- uptime
Input $10.00Output $50.00
55 tok/s100.00% uptime
Not used in Standard routing:Why these endpoints are not used
Input $11.00Output $55.00
-- tok/s100.00% uptime
Input $11.00Output $55.00
-- tok/s-- 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

$4.758/M tokens

Output

$50/M tokens

Claude Fable 5 — Price history

Price history

No effective price data for this selection

	$2.23	$50.00	90.1%	16.2%
	$4.33	$50.00	68.7%	0.5%
	$5.11	$50.00	58.3%	80.1%
	$8.30	$50.00	50.9%	0.8%
	$10.00	$50.00	0.0%	1.9%
Not used in Standard routing:Why these endpoints are not used
	$8.70	$55.00	39.9%	0.4%
	$11.00	$55.00	0.0%	0.0%

Effective in $2.23Effective out $50.00
Token share
16.2%
Effective in $4.33Effective out $50.00
Token share
0.5%
Effective in $5.11Effective out $50.00
Token share
80.1%
Effective in $8.30Effective out $50.00
Token share
0.8%
Effective in $10.00Effective out $50.00
Token share
1.9%
Not used in Standard routing:Why these endpoints are not used
Effective in $8.70Effective out $55.00
Token share
0.4%
Effective in $11.00Effective out $55.00
Token share
0.0%

Performance

Throughput is how fast the model writes (tokens per second — higher is better). Latency is total round-trip time (lower is better). TTFT is time-to-first-token — how long before you see anything appear (lower is better).

Throughput

62tok/s

P50, best across providers

Latency

1.49s

P50, best provider

Reasoning effortLatency / throughput

AutoExacto benchmarks

GPQA DiamondTAU-BenchClaude Platform on AWS89.5%79.9%Anthropic89.6%79.1%Azure89.4%78.9%Google Vertex89.1%79.2%Google Vertex (EU)89.4%78.5%auto-routing89.5%78.3%Google Vertex (US)88.0%76.7%

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)

99.94%

Availability over the last 3 days

Last 72 hours

Availability 99.94%

3 Days Ago2 Days AgoYesterdayNow

Availability over the last 24 hours

OpenRouter Availability

99.83%

Without Routing

92.84%

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 Fable 5 (Artificial Analysis, Design Arena and Vals AI)
Source	Benchmark	Score
Artificial Analysis	Claude Fable 5 (Max, Opus 4.8 Fallback) Coding Index	76.5
Artificial Analysis	Claude Fable 5 (Max, Opus 4.8 Fallback) Agentic Index	50.7
Artificial Analysis	Claude Fable 5 (Max, Opus 4.8 Fallback) GPQA Diamond	92.6%
Artificial Analysis	Claude Fable 5 (Max, Opus 4.8 Fallback) HLE	55.5%
Artificial Analysis	Claude Fable 5 (Max, Opus 4.8 Fallback) IFBench	63.5%
Artificial Analysis	Claude Fable 5 (Max, Opus 4.8 Fallback) τ²-Bench Telecom	98.5%
Artificial Analysis	Claude Fable 5 (Max, Opus 4.8 Fallback) AA-LCR	82.3%
Artificial Analysis	Claude Fable 5 (Max, Opus 4.8 Fallback) τ-Bench Banking	38.1%
Artificial Analysis	Claude Fable 5 (Max, Opus 4.8 Fallback) GDPval-AA	55.9%
Artificial Analysis	Claude Fable 5 (Max, Opus 4.8 Fallback) CritPt	28.6%
Artificial Analysis	Claude Fable 5 (Max, Opus 4.8 Fallback) SciCode	61.0%
Artificial Analysis	Claude Fable 5 (Max, Opus 4.8 Fallback) Terminal-Bench Hard	62.9%
Artificial Analysis	Claude Fable 5 (Max, Opus 4.8 Fallback) Terminal-Bench 4.0	42.4%
Artificial Analysis	Claude Fable 5 (Max, Opus 4.8 Fallback) Terminal-Bench 2.1	84.6%
Design Arena	Claude Fable 5 Agents Arena Agenticgamedev Elo	1234
Design Arena	Claude Fable 5 Agents Arena Agentichtmlslides Elo	1254
Design Arena	Claude Fable 5 Agents Arena Agenticslides(Html) Elo	1252
Design Arena	Claude Fable 5 Agents Arena Androidnative Elo	1276
Design Arena	Claude Fable 5 Agents Arena Full Stack Elo	1255
Design Arena	Claude Fable 5 Agents Arena Godotgamedev Elo	1270
Design Arena	Claude Fable 5 Agents Arena Htmlslides Elo	1172
Design Arena	Claude Fable 5 Agents Arena Mobile Apps Elo	1255
Design Arena	Claude Fable 5 Agents Arena Python-Pptxslides Elo	1266
Design Arena	Claude Fable 5 Agents Arena Webapps Elo	1240
Design Arena	Claude Fable 5 Models Arena 3D Elo	1296
Design Arena	Claude Fable 5 Models Arena Asciiart Elo	1321
Design Arena	Claude Fable 5 Models Arena Code Categories Elo	1301
Design Arena	Claude Fable 5 Models Arena Data Visualization Elo	1303
Design Arena	Claude Fable 5 Models Arena Game Development Elo	1325
Design Arena	Claude Fable 5 Models Arena SVG Elo	1292
Design Arena	Claude Fable 5 Models Arena UI Component Elo	1310
Design Arena	Claude Fable 5 Models Arena Website Elo	1288
Vals AI	Claude Fable 5 Code Migration	55.1%
Vals AI	Claude Fable 5 CorpFin v2	71.8%
Vals AI	Claude Fable 5 EMB	73.7%
Vals AI	Claude Fable 5 Finance Agent (v2)	56.3%
Vals AI	Claude Fable 5 GPQA Diamond	93.2%
Vals AI	Claude Fable 5 Harvey's Legal Agent Benchmark v1	11.3%
Vals AI	Claude Fable 5 IOI v1	72.3%
Vals AI	Claude Fable 5 LiveCodeBench	89.8%
Vals AI	Claude Fable 5 LegalBench	88.6%
Vals AI	Claude Fable 5 Legal Research Bench	49.5%
Vals AI	Claude Fable 5 MedCode	56.1%
Vals AI	Claude Fable 5 MedScribe	88.5%
Vals AI	Claude Fable 5 MMLU Pro	91.5%
Vals AI	Claude Fable 5 MMMU Pro	89.3%
Vals AI	Claude Fable 5 MortgageTax	68.9%
Vals AI	Claude Fable 5 ProgramBench	2.0%
Vals AI	Claude Fable 5 ProofBench v1.1	95.0%
Vals AI	Claude Fable 5 Public Benefits Bench v1.1	70.4%
Vals AI	Claude Fable 5 Vals RSI Index	24.3%
Vals AI	Claude Fable 5 SAGE v1	51.9%
Vals AI	Claude Fable 5 SWE-bench	95.0%
Vals AI	Claude Fable 5 Tax Agent Bench	38.3%
Vals AI	Claude Fable 5 TaxEval v2	76.9%
Vals AI	Claude Fable 5 Terminal-Bench 4.0	41.4%
Vals AI	Claude Fable 5 Terminal-Bench-Science	15.7%
Vals AI	Claude Fable 5 Vals Index	61.4%
Vals AI	Claude Fable 5 Vals Multimodal Index	74.2%
Vals AI	Claude Fable 5 Vibe Code Bench v1.1	90.4%
Vals AI	Claude Fable 5 Vals Web Search Index	46.9%

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.

Claude Code

Claude Code is Anthropic's agentic coding tool that reads your entire codebase, plans and executes changes across files, runs tests, and iterates on failures, all from natural language prompts.

16Btokens

Hermes Agent

Hermes Agent is an open-source, self-improving AI agent by Nous Research that runs persistently with memory across sessions, and builds reusable skills from experience. It comes with 40+ built-in tools, including web search, browser automation, and vision, plus scheduled automations and subagents.

10.4Btokens

LLM Proxy Load Balancer

new

9.11Btokens

Cline

Cline is an open-source AI coding agent that lives inside your IDE, autonomously exploring your codebase, editing files, running terminal commands, and using browser automation.

5.21Btokens

Infinite Worlds

Build your own adventures, share them with friends

3.74Btokens

Rest of OpenRouter

226M

Top 5 Apps

129M

Anthropic: Claude Fable versions

Available through EU in-region routing

Anthropic: Claude Fable 5 is available through EU in-region routing. Requests sent to eu.openrouter.ai are decrypted in the EU and routed only to shared provider endpoints in Europe (the EU/EEA, the UK, and Switzerland).

Providers in Europe

Google Vertex

Prices in Europe

Google Vertex: $11/M tokens input, $55/M tokens output

Base URL

https://eu.openrouter.ai/api/v1

Plan

Requires Business or Enterprise. Self-serve on Business: no contract, no monthly minimum. OpenRouter Business for EU in-region routing

Fails closed: if no shared provider endpoint in Europe is available, the request errors instead of leaving the region. Requests served by your own BYOK key go to your deployment’s region, which you control. 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 (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

Claude Opus 4.8 (batch)

Text1M context$2.50 / $12.50

Anthropic: Claude Fable 5

Providers