Anthropic: Claude Fable 5.1 (batch)

Anthropic

anthropic/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...

Context

1M

Input /1M

$5.00

Output /1M

$25.00

Latency (TTFT)

3,608ms

Pricing

Per 1M tokens, in USD

Input$5.00

Output$25.00

Cache read$0.125

Cache write (5m)$6.25

Cache write (1h)$10.00

Specs

text inimage infile intext outModerated

TokenizerClaude

Max output tokens128,000

Supported parameters

include_reasoningmax_tokensreasoningreasoning_effortresponse_formatstopstructured_outputstool_choicetoolsverbosity

Where it ranks on price

Against 157 routable models

Input$5.00

Cheaper than 6% of routable models

Output$25.00

Cheaper than 5% of routable models

Benchmarks

Intelligence53.4

Coding81.6

Agentic58.0

Composite scores (0–100) from Artificial Analysis, via OpenRouter's model catalog.

Call this model

Swap in your Mizan key — the request/response bodies are OpenAI chat-completion shaped.

cURL

curl https://api.app-mizan.com/v1/chat/completions \
  -H "Authorization: Bearer mizan_rt_..." \
  -H "Content-Type: application/json" \
  -d '{
    "model": "anthropic/claude-fable-5-1",
    "messages": [{ "role": "user", "content": "Say hi in five words." }]
  }'

Models

Anthropic: Claude Fable 5.1 (batch)

Anthropic

anthropic/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...

Context

1M

Input /1M

$5.00

Output /1M

$25.00

Latency (TTFT)

3,608ms

Pricing

Per 1M tokens, in USD

Input$5.00

Output$25.00

Cache read$0.125

Cache write (5m)$6.25

Cache write (1h)$10.00

Specs

text inimage infile intext outModerated

TokenizerClaude

Max output tokens128,000

Supported parameters

include_reasoningmax_tokensreasoningreasoning_effortresponse_formatstopstructured_outputstool_choicetoolsverbosity

Where it ranks on price

Against 157 routable models

Input$5.00

Cheaper than 6% of routable models

Output$25.00

Cheaper than 5% of routable models

Benchmarks

Intelligence53.4

Coding81.6

Agentic58.0

Composite scores (0–100) from Artificial Analysis, via OpenRouter's model catalog.

Call this model

Swap in your Mizan key — the request/response bodies are OpenAI chat-completion shaped.

cURL

curl https://api.app-mizan.com/v1/chat/completions \
  -H "Authorization: Bearer mizan_rt_..." \
  -H "Content-Type: application/json" \
  -d '{
    "model": "anthropic/claude-fable-5-1",
    "messages": [{ "role": "user", "content": "Say hi in five words." }]
  }'