OpenAI: GPT-5.1 (batch)

OpenAI

openai/gpt-5.1

GPT-5.1 is the latest frontier-grade model in the GPT-5 series, offering stronger general-purpose reasoning, improved instruction adherence, and a more natural conversational style compared to GPT-5. It uses adaptive reasoning...

Context

400K

Input /1M

$0.625

Output /1M

$5.00

Latency (TTFT)

504ms

Pricing

Per 1M tokens, in USD

Input$0.625

Output$5.00

Cache read$0.0625

Specs

image intext infile intext outModerated

TokenizerGPT

Max output tokens128,000

Supported parameters

include_reasoningmax_tokensreasoningreasoning_effortresponse_formatseedstructured_outputstool_choicetools

Where it ranks on price

Against 157 routable models

Input$0.625

Cheaper than 44% of routable models

Output$5.00

Cheaper than 28% 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": "openai/gpt-5.1",
    "messages": [{ "role": "user", "content": "Say hi in five words." }]
  }'

Models

OpenAI: GPT-5.1 (batch)

OpenAI

openai/gpt-5.1

GPT-5.1 is the latest frontier-grade model in the GPT-5 series, offering stronger general-purpose reasoning, improved instruction adherence, and a more natural conversational style compared to GPT-5. It uses adaptive reasoning...

Context

400K

Input /1M

$0.625

Output /1M

$5.00

Latency (TTFT)

504ms

Pricing

Per 1M tokens, in USD

Input$0.625

Output$5.00

Cache read$0.0625

Specs

image intext infile intext outModerated

TokenizerGPT

Max output tokens128,000

Supported parameters

include_reasoningmax_tokensreasoningreasoning_effortresponse_formatseedstructured_outputstool_choicetools

Where it ranks on price

Against 157 routable models

Input$0.625

Cheaper than 44% of routable models

Output$5.00

Cheaper than 28% 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": "openai/gpt-5.1",
    "messages": [{ "role": "user", "content": "Say hi in five words." }]
  }'