OpenAI: GPT-5.1-Codex-Max

Public pricingIntelligence 79/100Large memoryVisãoRaciocínio profundoUso de ferramentas

OpenAI: GPT-5.1-Codex-Max é um modelo multimodal criado para programação, engenharia de software e fluxos agênticos. Ele combina o tratamento multimodal de entradas e bom desempenho em programação, um contexto de 400K tokens e um perfil custo equilibrado para entregar trabalho confiável em programação, engenharia de software e fluxos agênticos.

Input

$1.25/1M

Output

$10.00/1M

Cached

$0.13/1M

Batch

$0.63/1M

Calculate your GPT-5.1-Codex-Max bill.

Set your workload — see cost at your exact volume.

What would GPT-5.1-Codex-Max cost you?

Adjust the workload to see your monthly bill.

1,00010,00050,000250,0001M10M

Technical specifications

GPT-5.1-Codex-Max at a glance.

Memory

400,000

tokens

Max reply

128,000

tokens

Memory tier

Large

an entire book or large codebase

Tokenizer

tiktoken-o200k

Released

Dec 2025

Training cutoff

Jul 2025

Availability

Public pricing

Status

active

What it can do

Capabilities & limits.

  • Understands images
  • Deep step-by-step thinking
  • Uses tools / calls functions
  • Strict JSON output
  • Streams replies
  • Fine-tunable on your data

When to pick GPT-5.1-Codex-Max

  • Multi-step reasoning, research agents, or hard math.
  • Screenshot analysis, image understanding, or document OCR.
  • Agentic workflows that call tools or APIs.
  • Long documents, full codebases, or extensive chat histories.

When to look elsewhere

  • Very latency-sensitive, real-time apps where every millisecond counts.

Alternatives

Similar models to compare.

FAQ

GPT-5.1-Codex-Max — the questions we see most.

Pricing, capabilities, alternatives — generated from the same data that powers the calculator above.

Get instant answers from our AI agent

At a typical workload of 50,000 conversations a month with 1,500-token prompts and 800-token replies, GPT-5.1-Codex-Max costs roughly $494 per month. Input is $1.25 /1M tokens and output is $10.00 /1M tokens.
GPT-5.1-Codex-Max has a 400,000-token context window (large memory — an entire book or large codebase). That means you can fit about 75,000 words of input and history in a single call.
Beyond text generation, GPT-5.1-Codex-Max supports understanding images, deep step-by-step reasoning, calling functions / tools, strict JSON output, fine-tuning on your own data. It streams replies by default.
GPT-5.1-Codex-Max was released in December 2025, with training data cut off around July 2025.
Models in a similar class include GPT-5, GPT-5 Codex, GPT-5.1. The "Similar models" section below this FAQ links into each.

Still unsure?

Compare GPT-5.1-Codex-Max against 100+ other models.

Open the full wizard — pick a use case, set your usage, and see side-by-side monthly costs in under a minute.

Open the comparison wizard