GPT-5.1 — OpenAI | Modeldex

GPT-5.1

Active

OpenAI GPT-5.1.

Updated 3 days agoStructured data from Modeldex catalog

VisionAgenticLong context

API release

Nov 13, 2025(5 months ago)

Not enough benchmark coverage yet for an Intelligence Index — needs at least 3 results across 2 categories.

History

GPT-5.1 became available via the OpenAI API on 2025-11-13.

Training & availability

OpenAI has not released the underlying model weights — access is via their hosted API only.

Capabilities

Context window: 272K tokens.
Max output: 128K tokens.
Input modalities: text, image.

Recommended for: vision, agentic, long-context.

Quick start

Minimal example using the openai API. Copy, paste, replace the key.

from openai import OpenAI

client = OpenAI(api_key="sk-...")
resp = client.chat.completions.create(
    model="gpt-5-1",
    messages=[{"role": "user", "content": "Explain quantum computing in one sentence."}],
)
print(resp.choices[0].message.content)

Cost calculator

Estimate your monthly bill. Presets are typical workload sizes.

Input tokens / month5.0M

@ $1.25/1M

Output tokens / month2.0M

@ $10/1M

Input cost

$6.25

5.0M × $1.25/1M

Output cost

$20

2.0M × $10/1M

Total / month

$26.25

$315 / year

Integrations & tooling support

Tool calling: Supported
Structured outputs: Supported

Price vs quality

Mid-tier pricing

Standard pricing band. Quality tier pending more benchmark coverage.

Quality percentile: —
Effective price: $7.81/1M
Pricing breakdown: $1.25/1M in
$10/1M out

Community ratings

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