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Scheduled for retirement on May 18, 2027. Still available at the prices below until then.

GPT-5.1-Codex-Max

OpenAIReleased Nov 13, 2025KnowledgeSep 2024
VisionTool useReasoningPrompt cachingStructured outputWeb search
Compare GPT-5.1-Codex-MaxCount tokens for GPT-5.1-Codex-Max
Context
400K
Max output
128K
Serving providers
4
Cheapest input
$1.25 /1M
On-demand listed rates, OpenRouter routed quotes and Vercel reseller quotes. Enterprise commitments (committed-use discounts, provisioned throughput, negotiated rates) can be materially lower.

Pricing by serving provider

standard tier · per 1M tokens · click a provider to expand

Input pricing runs from $1.25 to $1.38 per 1M tokens across 4 providers, so the dearest route costs 10% more than the cheapest for the same model.

Serving providerInput /1MOutput /1MEndpoints
DatabricksCheapest$1.25$10.001
Standarddatabricks/databricks-gpt-5-1-codex-max
ComponentUnitStandard
Text cached in/1M tok$0.125
Text cache write/1M tok$1.25
Text input/1M tok$1.25
Text output/1M tok$10.00
OpenRouter$1.25$10.001
VercelVercel reseller quote$1.25$10.001
Azure$1.38$11.001

Price history

listed seller prices, input and output per 1M tokens
Input Output
$0.00$5.00$10.00Aug 19Aug 26Sep 17$10.00$1.25

Cost calculator

estimate your monthly spend on this model
$1,050
estimated / month

Model IDs

copy the exact identifier for your platform
databricks/databricks-gpt-5-1-codex-maxopenai/gpt-5.1-codex-maxopenai/gpt-5.1-codex-maxazure/eu/gpt-5.1-codex-max

Frequently asked questions

GPT-5.1-Codex-Max pricing, context and availability

Is GPT-5.1-Codex-Max still available?

Yes. GPT-5.1-Codex-Max is scheduled for retirement on 2027-05-18.

How much does GPT-5.1-Codex-Max cost?

GPT-5.1-Codex-Max costs $1.25 per 1M input tokens from Databricks, and $10.00 per 1M output tokens from Databricks. Across 4 serving providers, input prices range from $1.25 to $1.38 per 1M tokens.

What is the context window of GPT-5.1-Codex-Max?

GPT-5.1-Codex-Max accepts up to 400K tokens of context and can return up to 128K output tokens.

Which providers serve GPT-5.1-Codex-Max?

GPT-5.1-Codex-Max is available from 4 serving providers, each with its own pricing and model ID. Databricks is currently the cheapest.

What can GPT-5.1-Codex-Max do?

GPT-5.1-Codex-Max supports image input (vision), tool use, reasoning, prompt caching, structured output and web search.

Other OpenAI models

compare pricing across the OpenAI lineup
gpt-oss-120b$0.03/1M · 23 providersgpt-oss-20b$0.0145/1M · 15 providersGPT-5 Mini$0.25/1M · 9 providersGPT-5$1.25/1M · 9 providersGPT-5 Nano$0.05/1M · 8 providersGPT-5.6 Luna$0.20/1M · 7 providersGPT-5.6 Terra$2.00/1M · 7 providersGPT-4o-mini$0.15/1M · 6 providers
Listed prices from LiteLLM, OpenRouter and Vercel · last checked Sep 22, 2026

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