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GPT-5

OpenAI's August 2025 unified frontier model that auto-routes between a fast model and a deeper "thinking" variant.

Publisher
OpenAI
Family
GPT 5
Params
Undisclosed (closed)
Context
400K
Input
Output
Providers
openai
Released
7 Aug 2025

Cite

Notes

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Context
400K
Weights
Closed
API only
Input
$1.25
/1M tok
Output
$10
/1M tok
Blended
$3.44
#440/ 500/1M · 3:1
Speed
0
Cache read
$0.13
0.10x input

Price & speed via Artificial Analysis · ranked across tracked models · caching via OpenRouter

Reasoning effortIndexPriceSpeed
high23.0$3.440 t/s
medium22.9$3.440 t/s
low20.8$3.440 t/s
minimal11.4$3.440 t/s
ChatGPT10.4$0.000 t/s

Intelligence Index per reasoning-effort setting, via Artificial Analysis

Reported on 62 evals across 15 domains - best 100.0% on Gutenberg Env · #1 of 5

Reported eval scores

62

Head-to-heads

29

benchmark comparisons against other models

Introduced in

paperIntroducing GPT-5