OpenAI: GPT-5.1 Chat

Public pricingIntelligence 80/100Medium memoryVisionOutils

OpenAI: GPT-5.1 Chat est un modèle multimodal conçu pour raisonnement et analyse multimodaux. Il associe la gestion multimodale des entrées et un raisonnement et une planification poussés, un contexte de 128K tokens et un profil à coût équilibré pour un travail fiable sur raisonnement et analyse multimodaux.

Input

$1.25/1M

Output

$10.00/1M

Cached

$0.13/1M

Batch

$0.31/1M

Calculate your GPT-5.1 Chat bill.

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What would GPT-5.1 Chat cost you?

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Technical specifications

GPT-5.1 Chat at a glance.

Memory

128,000

tokens

Max reply

16,384

tokens

Memory tier

Medium

a long report or a codebase file

Tokenizer

tiktoken-o200k

Released

Nov 2025

Training cutoff

Jul 2025

Availability

Public pricing

Status

active

Benchmarks

Quality benchmarks

Independent evaluations from public leaderboards. Higher is better.

  • frontiermath_tier_4

    4.17

  • gpqa_diamond

    85.04

  • humanitys_last_exam

    23.68

  • swe_bench_verified

    67.98

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 Chat

  • Screenshot analysis, image understanding, or document OCR.
  • Agentic workflows that call tools or APIs.
  • Code generation, review, or refactoring.
  • Multimodal pipelines mixing text + images.

When to look elsewhere

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

Alternatives

Similar models to compare.

FAQ

GPT-5.1 Chat — 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 Chat costs roughly $494 per month. Input is $1.25 /1M tokens and output is $10.00 /1M tokens.
GPT-5.1 Chat has a 128,000-token context window (medium memory — a long report or a codebase file). That means you can fit about 24,000 words of input and history in a single call.
Beyond text generation, GPT-5.1 Chat supports understanding images, calling functions / tools, strict JSON output, fine-tuning on your own data. It streams replies by default.
GPT-5.1 Chat was released in November 2025, with training data cut off around July 2025.
Models in a similar class include GPT-5, GPT-5 Chat, GPT-5 Codex. The "Similar models" section below this FAQ links into each.

Still unsure?

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