GPT-5.1

OpenAI's flagship with adaptive reasoning and a huge ecosystem.

Intelligence

AA Intelligence Index39

independent benchmark score from Artificial Analysis, not Timace's own judgment

Best for

  • General assistant use with the broadest tool ecosystem

Not ideal for

  • Fully offline or self-hosted deployments

Specifications

Developer
OpenAI

confidence 100%

openai.com

Verified Jul 21, 2026 · curated

Context window (tokens)
400K tokens

confidence 80%

platform.openai.com

Verified Jul 21, 2026 · curated

Input $/MTok
$1.25 / MTok

confidence 85%

openai.com

Verified Jul 21, 2026 · curated

Output $/MTok
$10 / MTok

confidence 85%

openai.com

Verified Jul 21, 2026 · curated

Modalities
text, image, audio, code

confidence 85%

openai.com

Verified Jul 21, 2026 · curated

API available
Yes

confidence 100%

openai.com

Verified Jul 21, 2026 · curated

Open source
No

confidence 100%

openai.com

Verified Jul 21, 2026 · curated

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