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Comparison

GPT 5 Chat vs Claude Opus 4.6 Fast

Side-by-side comparison of OpenAI GPT 5 Chat and Anthropic Claude Opus 4.6 Fast. Pricing, quality benchmarks, and context windows.

Quality Benchmarks

LiveBench / 0-100

Coding85 / 68Math85 / 89Reasoning85 / 87Language85 / 70

GPT 5 Chat

85.1Frontier

Claude Opus 4.6 Fast

78.7Frontier

GPT 5 Chat
Claude Opus 4.6 Fast

Input Price (per 1M)

$1.25
96% less
$30.00

Output Price (per 1M)

$10.00
93% less
$150.00

Context Window

128K
1M
7.8x

Max Output

16.4K
128K
7.8x

OpenAI

GPT 5 Chat

vs

Anthropic

Claude Opus 4.6 Fast

Pricing per 1M Tokens

$1.25

96% cheaper

Input

Input

$30.00

Input

$10.00

93% cheaper

Output

Output

$150.00

Output

Token Limits

Context

128K

Context

Context

1M

Max Output

16.4K

Max Output

Max Output

128K

Vision
VisionTools

GPT 5 Chat Details

$1.25 in / $10.00 out

Claude Opus 4.6 Fast Details

$30.00 in / $150.00 out

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