OpenAI: gpt-5.1-codex

deprecatedproprietary

Status: Shut down

Intelligence
Reasoning
Speed
Context
400K
Max output
128K
Input price
$1.25/1M tokens
Output price
$10/1M tokens

Capabilities

Reasoning & Interaction
Reasoning
Tool Calling
Output Control
Structured Output
JSON Mode
Infrastructure
Streaming

Details

Model IDopenai/gpt-5.1-codex
Provider Cloudflare AI Gateway
Creator OpenAI
Familygpt-5.1
Licenseproprietary
Statusdeprecated
Typechat
Input modalitiestext
Output modalitiestext
Open weightNo
Parameters—
Architecture—
Context window400K tokens
Max input—
Max output128K tokens
Reasoning tokensYes
Knowledge cutoff
Release date—
Deprecation date
Sourceofficial

Pricing

Input
$1.25
Output
$10
Cache write
—
Cache read
—
Batch in
—
Batch out
—

Family Comparison: gpt-5.1

ModelContextMax outPricing
Azure OpenAI: gpt-5.1-codex-mini——$0.25$2
OpenAI: gpt-5.1-codex-mini-20251113——$0.25$2
OpenAI: gpt-5.1-codex-mini400K128K$0.25$2
OpenRouter: openai/gpt-5.1-codex-mini-20251113——$0.25$2
OpenRouter: openai/gpt-5.1-codex-mini——$0.25$2
Azure OpenAI: gpt-5.1-chat-2025-11-13——$1.25$10
Azure OpenAI: gpt-5.1-chat——$1.25$10
Azure OpenAI: gpt-5.1-codex-max——$1.25$10
Azure OpenAI: gpt-5.1-codex——$1.25$10
Azure OpenAI: gpt-5.1——$1.25$10
OpenAI: gpt-5.1-20251113400K128K$1.25$10
OpenAI: gpt-5.1-chat-20251113——$1.25$10
OpenAI: gpt-5.1-chat-latest128K16K$1.25$10
OpenAI: gpt-5.1-chat——$1.25$10
OpenAI: gpt-5.1-codex-20251113——$1.25$10
OpenAI: gpt-5.1-codex-max-20251204——$1.25$10
OpenAI: gpt-5.1-codex-max400K128K$1.25$10
OpenAI: gpt-5.1-codex400K128K$1.25$10
OpenAI: gpt-5.1400K128K$1.25$10
OpenRouter: openai/gpt-5.1-20251113——$1.25$10
OpenRouter: openai/gpt-5.1-chat-20251113——$1.25$10
OpenRouter: openai/gpt-5.1-chat——$1.25$10
OpenRouter: openai/gpt-5.1-codex-20251113——$1.25$10
OpenRouter: openai/gpt-5.1-codex-max-20251204——$1.25$10
OpenRouter: openai/gpt-5.1-codex-max——$1.25$10
OpenRouter: openai/gpt-5.1-codex——$1.25$10
OpenRouter: openai/gpt-5.1——$1.25$10

API

GET/v1/models/cloudflare-ai-gateway/openai/gpt-5.1-codex

OpenAI: gpt-5.1-codex

deprecated
openai/gpt-5.1-codex

Status: Shut down

Changes · 3 entries
openai/gpt-5.1-codexupdate1cd659eMar 24, 2026, 04:19 AM
modalitiesinput["text"]output["text"]
openai/gpt-5.1-codexupdate2b100acMar 23, 2026, 05:30 AM
model_typechat
openai/gpt-5.1-codexcreate7a4f1f6Mar 22, 2026, 05:43 AM