Claude Fable 5.1
AnthropicReleased Sep 1, 2026
- providers
- 1
- context
- 1.0M
- max out
- 128K
- input /M
- $10.00
- output /M
- $50.00
- cached input /M
- $0.25
- cache write /M
- $12.50
- reasoning /M
- $50.00
About
Drafted from the provider's own page.
If you're unsure which model to use, start with Claude Opus 5.5 for most workloads. Use Claude Fable 5.1 for demanding reasoning and long-horizon agentic work, or when your evals on Claude Opus 5.5 at higher effort still fall short.
- knowledge cutoff
- Jun 1, 2026
- open weights
- no
- best for
- computeextractioncoding
Capabilities
What the model accepts and returns, where a probe through our own gateway proved it.
- streaming
- tools
- json mode
- vision
- audio
Providers
What you pay through us for each provider, and its own list price where that differs.
Anthropic
anthropic/claude-fable-5-1- input /M
- $10.00
- output /M
- $50.00
- cache read /M
- $0.25
- cache write /M
- $12.50
Cache read $0.25/M · Cache write $12.50/M
cache read list price /M$0.251.0M context128K max out
Speed
- fastest over 24 hours
- 17.9 t/s
Fastest: Anthropic
- Anthropic741 ms to first token17.9 t/smedian of 24
Served
- served in the last 24 hours
- 100.00%
Across 1 provider, 24 of 24 requests
- Anthropic100.00% · 24 of 24
Rebuilt once a day from the requests we sent, so it is a daily figure and not a live one.
Not yet. These figures come from Artificial Analysis, which the publish pipeline reads once a day.
Integrations
What the model holds, rather than a compatibility grade: nothing here measures how well a particular tool gets on with it, so nothing here scores one.
- answers on
- chat completions
- accepts
- textimagepdf
- returns
- text
Use this model
Works with the OpenAI SDK. Point it at our base URL and use this id.
curl https://api.hopscotchlabs.ai/v1/chat/completions \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "anthropic/claude-fable-5-1",
"messages": [{"role": "user", "content": "Hello"}],
"max_tokens": 256
}'