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GPT-5.1 Codex

OpenAI
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GPT-5.1 Codex is a version of GPT-5.1 optimized for agentic coding inside the Codex environment, with regular underlying model refreshes. It supports a 400,000-token input context with 128,000 output tokens, accepts text and image inputs, and exposes reasoning tokens, streaming, function calling, and structured outputs. Available exclusively through the Responses API.

Providers
Capabilities
OpenAI
openai-byok
$0
$0
$0
Unavailable
OpenCode Zen
opencode-zen-byok
$0
$0
$0
Unavailable
Cline
cline-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 share card
GPT-5.1 Codex
OpenAI upstream share card
OpenAI upstream
OpenCode Zen upstream share card
OpenCode Zen upstream
Cline upstream share card
Cline upstream
Credits
Use your own key

Run GPT-5.1 Codex 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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