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Comparison

GPT 5 Chat vs GPT 5.5

Side-by-side comparison of OpenAI GPT 5 Chat and OpenAI GPT 5.5. Pricing, quality benchmarks, and context windows.

Quality Benchmarks

LiveBench / 0-100

Coding85 / 67Math85 / 96Reasoning85 / 92Language85 / 77

GPT 5 Chat

85.1Frontier

GPT 5.5

83.0Frontier

GPT 5 Chat
GPT 5.5

Input Price (per 1M)

$1.25
75% less
$5.00

Output Price (per 1M)

$10.00
67% less
$30.00

Context Window

128K
1.1M
8.2x

Max Output

16.4K
128K
7.8x

OpenAI

GPT 5 Chat

vs

OpenAI

GPT 5.5

Pricing per 1M Tokens

$1.25

75% cheaper

Input

Input

$5.00

Input

$10.00

67% cheaper

Output

Output

$30.00

Output

Token Limits

Context

128K

Context

Context

1.1M

Max Output

16.4K

Max Output

Max Output

128K

Vision
VisionTools

GPT 5 Chat Details

$1.25 in / $10.00 out

GPT 5.5 Details

$5.00 in / $30.00 out

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