Claude Fable 5.1
The successor to Claude Fable 5, positioned above the Opus tier for demanding reasoning and long-horizon agentic work, with thinking always on and adjusted per task.
- Context
- 1M tokens
- Max output
- 128K
- Cutoff
- Released
Hosted API price
List price via Anthropic · per 1M tokens
- Input
- $10.00 /1M
- Output
- $50.00 /1M
- Hosted by
-
2 providers
Hosted API pricing
How we price
Order
Providers are listed cheapest input rate first, then by output rate, a tie going to the creator's own listing. A provider that lists the model without a published rate sits at the end.
Prices
Base-tier, on-demand rates in USD per 1M tokens, converted at ECB reference rates where a provider publishes in another currency. Cached-input and batch rates show only where a provider publishes them. "Cheapest" marks the one provider with the lowest input and output pair; a tie wears no badge.
Cost
Input rate times the input tokens plus output rate times the output tokens, at the monthly volume set above the table. Cached-input, batch, long-context and reasoning-token billing are not modelled.
Transparency and funding
- Affiliates: Affiliate links are marked. We may earn a commission if you click them, but commissions never affect the order.
Every provider serving Claude Fable 5.1, cheapest input first. Set your monthly volume to see what each would bill.
| Provider | Input /1M | Output /1M | Cached input /1M | Cost at 10M in + 2M out | Link |
|---|---|---|---|---|---|
|
Anthropic
Creator
|
$10.00 | $50.00 | $0.25 | $200.00 | Visit website |
|
DigitalOcean
|
$10.00 | $50.00 | $0.25 | $200.00 | Visit website |
Heads up: Base-tier, on-demand rates per 1M tokens; cached, batch and long-context tiers excluded. A provider may serve a shorter context or a quantized build than the creator's release. Verify before provisioning. More on how we price.
Similarly priced models
The models nearest Claude Fable 5.1 by blended rate, each at its own cheapest provider.
| Model | Blended /1M | Input /1M | Output /1M | Context | Cutoff | vs Claude Fable 5.1 |
|---|---|---|---|---|---|---|
|
Claude Opus 4.7
Anthropic
|
$8.3333 | $5.00 | $25.00 | 1M | Jan 2026 | −50% |
|
Claude Opus 4.8
Anthropic
|
$8.3333 | $5.00 | $25.00 | 1M | Jan 2026 | −50% |
|
Claude Opus 5
Anthropic
|
$8.3333 | $5.00 | $25.00 | 1M | May 2026 | −50% |
GPT-5.5
OpenAI
|
$9.1667 | $5.00 | $30.00 | 1M | Dec 2025 | −45% |
|
Claude Fable 5
Anthropic
|
$16.6667 | $10.00 | $50.00 | 1M | Jan 2026 | 0% |
|
Claude Fable 5.1
This model
Anthropic
|
$16.6667 | $10.00 | $50.00 | 1M | Jun 2026 | |
|
GPT-6 Astra
OpenAI
|
$16.6667 | $10.00 | $50.00 | 1M | Apr 2026 | 0% |
|
o3-pro
OpenAI
|
$30.00 | $20.00 | $80.00 | 200K | Jun 2024 | +80% |
|
GPT-5 Pro
OpenAI
|
$32.50 | $15.00 | $120.00 | 400K | Sep 2024 | +95% |
|
GPT-5.2 Pro
OpenAI
|
$45.50 | $21.00 | $168.00 | 400K | Aug 2025 | +173% |
|
GPT-5.4 Pro
OpenAI
|
$55.00 | $30.00 | $180.00 | 1M | Aug 2025 | +230% |
USD per 1M tokens at each model's cheapest listed provider. Blended is the cost of 10M input plus 2M output tokens, spread over the 12M.
Capabilities
What Claude Fable 5.1 accepts and can do, as published by Anthropic.
- Text Accepts and generates natural-language text.
- Image Accepts images as input alongside text.
- Reasoning Thinks before it answers, always on or as a switchable mode.
- Function calling Connect to external tools, APIs, and systems.
- Structured output Return responses in structured formats like JSON.
- Web search Search the web for up-to-date information.
- Code execution Write and execute code in a sandboxed environment.
- File upload Process uploaded documents, spreadsheets, and other files.
- MCP Connect to services via Model Context Protocol.
Common questions
What is Claude Fable 5.1 good for?
Long-horizon agent work and hard reasoning, plus multistep research and document, spreadsheet and slide tasks. Thinking is always on and its depth is steered by an effort setting. It sits at the top of Anthropic's price range, above Opus 5.
When is Claude Fable 5.1 not a good fit?
Audio or video input, and closed weights, so no self-hosting. Cost-sensitive or high-volume work too, and Anthropic rates its latency the slowest of the current lineup and says its safety classifiers can decline requests, so plan for refusals and a fallback model.
What is the cheapest way to run Claude Fable 5.1?
The cheapest hosted rate is $10.00 / $50.00 per 1M tokens via Anthropic.
How does Claude Fable 5.1 compare with Claude Fable 5?
Anthropic says Claude Fable 5.1 extends Claude Fable 5 with stronger long-running agentic coding, multistep research, and document, spreadsheet and slide work. It adds per-message effort and readable progress updates between tool calls, and forced tool use now returns an error. Same price, 1M-token context and text and image input. Claude Fable 5.1 came out 3 months later and has a newer knowledge cutoff (June 2026 against January 2026).
Can I self-host Claude Fable 5.1?
No. Anthropic does not publish the weights; Claude Fable 5.1 is available only through hosted APIs.
More from Anthropic
-
Claude Fable 5
1M context · cutoff Jan 2026
From $10.00 / $50.00 /1M in / out at the cheapest provider
-
Claude Opus 5
1M context · cutoff May 2026
From $5.00 / $25.00 /1M in / out at the cheapest provider
-
Claude Opus 4.7
1M context · cutoff Jan 2026
From $5.00 / $25.00 /1M in / out at the cheapest provider
-
Claude Opus 4.8
1M context · cutoff Jan 2026
From $5.00 / $25.00 /1M in / out at the cheapest provider
-
Claude Opus 4.6
1M context · cutoff May 2025
From $5.00 / $25.00 /1M in / out at the cheapest provider
-
Claude Opus 4.5
200K context · cutoff May 2025
From $5.00 / $25.00 /1M in / out at the cheapest provider
-
Claude Opus 5.5
1M context · cutoff Jun 2026
From $4.00 / $20.00 /1M in / out at the cheapest provider
-
Claude Sonnet 4.6
1M context · cutoff Aug 2025
From $3.00 / $15.00 /1M in / out at the cheapest provider