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GPT-5.1 Codex Mini

OpenAI
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GPT-5.1 Codex Mini is a smaller, more cost-effective version of GPT-5.1 Codex, tuned for agentic coding workloads where efficiency matters more than peak capability. It supports a 400,000-token input context with 128,000 output tokens, text and image inputs, and exposes streaming, function calling, and structured outputs with reasoning-token support.

Providers
Capabilities
OpenAI
openai-byok
$0
$0
Unavailable
OpenCode Zen
opencode-zen-byok
$0
$0
Unavailable
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API & code
Uptime & Health
No uptime data yet

These providers haven't been health-probed for this model yet. The router still routes around upstreams that fail live requests — uptime fills in once probe history accrues.

Share cards
GPT-5.1 Codex Mini share card
GPT-5.1 Codex Mini
OpenAI upstream share card
OpenAI upstream
OpenCode Zen upstream share card
OpenCode Zen upstream
Credits
Use your own key

Run GPT-5.1 Codex Mini on your own key — your requests are billed by the provider. Pool callers pay AnyRouter credits.

No BYOK keys configured for this model yet.

Share a key with the pool to earn credits for every request it serves, covering your plan cost.

Text generation
Context length400,000 tokens
Max output128,000 tokens
ArchitectureTransformer
Categorytext
ReleasedNov 13, 2025
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