Anthropic: Claude Opus 5.5

Anthropic

anthropic/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...

Context

1M

Input /1M

$4.00

Output /1M

$20.00

Latency (TTFT)

757ms

Pricing

Per 1M tokens, in USD

Input$4.00

Output$20.00

Cache read$0.20

Cache write (5m)$5.00

Cache write (1h)$8.00

Specs

text inimage infile intext outModerated

TokenizerClaude

Max output tokens128,000

Supported parameters

include_reasoningmax_completion_tokensmax_tokensreasoningreasoning_effortresponse_formatstopstructured_outputstool_choicetoolsverbosity

Where it ranks on price

Against 165 routable models

Input$4.00

Cheaper than 12% of routable models

Output$20.00

Cheaper than 10% of routable models

Benchmarks

No third-party benchmark data available for this model yet.

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-opus-5-5",
    "messages": [{ "role": "user", "content": "Say hi in five words." }]
  }'

Models

Anthropic: Claude Opus 5.5

Anthropic

anthropic/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...

Context

1M

Input /1M

$4.00

Output /1M

$20.00

Latency (TTFT)

757ms

Pricing

Per 1M tokens, in USD

Input$4.00

Output$20.00

Cache read$0.20

Cache write (5m)$5.00

Cache write (1h)$8.00

Specs

text inimage infile intext outModerated

TokenizerClaude

Max output tokens128,000

Supported parameters

include_reasoningmax_completion_tokensmax_tokensreasoningreasoning_effortresponse_formatstopstructured_outputstool_choicetoolsverbosity

Where it ranks on price

Against 165 routable models

Input$4.00

Cheaper than 12% of routable models

Output$20.00

Cheaper than 10% of routable models

Benchmarks

No third-party benchmark data available for this model yet.

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-opus-5-5",
    "messages": [{ "role": "user", "content": "Say hi in five words." }]
  }'