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Comparison

GPT 5.5 vs Claude Opus 4

Side-by-side comparison of OpenAI GPT 5.5 and Anthropic Claude Opus 4. Pricing, quality benchmarks, and context windows.

Quality Benchmarks

LiveBench / 0-100

Coding67 / 98Math96 / 98Reasoning92 / 98Language77 / 98

GPT 5.5

83.0Frontier

Claude Opus 4

97.8Frontier

GPT 5.5
Claude Opus 4

Input Price (per 1M)

$5.00
67% less
$15.00

Output Price (per 1M)

$30.00
60% less
$75.00

Context Window

1.1M
5.3x
200K

Max Output

128K
4.0x
32K

OpenAI

GPT 5.5

vs

Anthropic

Claude Opus 4

Pricing per 1M Tokens

$5.00

67% cheaper

Input

Input

$15.00

Input

$30.00

60% cheaper

Output

Output

$75.00

Output

Token Limits

Context

1.1M

Context

Context

200K

Max Output

128K

Max Output

Max Output

32K

VisionTools
VisionTools

GPT 5.5 Details

$5.00 in / $30.00 out

Claude Opus 4 Details

$15.00 in / $75.00 out

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$1.25/M in · Score 94

Top Anthropic pick

GPT 5.5 vs Claude Opus 4.7

$5.00/M in · Score 79.7

OpenAI

GPT 5 vs Claude Opus 4$1.25/MGPT 5 Image vs Claude Opus 4$10.00/MGPT 5 Chat vs Claude Opus 4$1.25/MGPT 5.4 vs Claude Opus 4$2.50/M

Anthropic

GPT 5.5 vs Claude Opus 4.7 Fast$30.00/MGPT 5.5 vs Claude Opus 4.6$5.00/MGPT 5.5 vs Claude Opus 4.6 Fast$30.00/MGPT 5.5 vs Claude Sonnet 4.6$3.00/M

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