GPT-5.1 Chat

by OpenAI · gpt-codex family · released 2025-11-13

On output pricing, GPT-5.1 Chat is cheaper than 149 of the 588 priced models tracked here, at $10/Mtok. Its 128,000-token context window is larger than 204 of 674 models. Capabilities: vision, tools, reasoning, structured output.

Specifications

ProviderOpenAI
Familygpt-codex
Input price$1.25/Mtok
Output price$10/Mtok
Cache read price$0.125/Mtok
Context window128,000
Max output tokens16,384
Input modalitiestext, image
Output modalitiestext
Capabilitiesvision, tools, reasoning, structured output
Knowledge cutoff2024-09-30
Released2025-11-13

Estimate GPT-5.1 Chat costs for your workload →

Similar models

GPT-5.3 Codex
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OpenAI · $14/Mtok out · 400K context
GPT-5.2 Chat
OpenAI · $14/Mtok out · 128K context
GPT-5.1 Codex Max
OpenAI · $10/Mtok out · 400K context

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OpenAI documentation → ← All AI models

Data synced daily from models.dev (last synced 14 hours ago). Always verify pricing with OpenAI before deploying to production.