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Comparison

Claude Opus 4.5 vs GPT 5 Chat

Side-by-side comparison of Anthropic Claude Opus 4.5 and OpenAI GPT 5 Chat. Pricing, quality benchmarks, and context windows.

Quality Benchmarks

LiveBench / 0-100

Coding70 / 85Math90 / 85Reasoning84 / 85Language68 / 85

Claude Opus 4.5

78.0Frontier

GPT 5 Chat

85.0Frontier

Claude Opus 4.5
GPT 5 Chat

Input Price (per 1M)

$5.00
$1.25
75% less

Output Price (per 1M)

$25.00
$10.00
60% less

Context Window

200K
1.6x
128K

Max Output

64K
3.9x
16.4K

Anthropic

Claude Opus 4.5

OpenAI

GPT 5 Chat

Pricing per 1M Tokens

$5.00

Input

$1.25

75% cheaper

Input

$25.00

Output

$10.00

60% cheaper

Output

Token Limits

Context

200K

Context

128K

Max Output

64K

Max Output

16.4K

VisionTools
Vision

Claude Opus 4.5 Details

$5.00 in / $25.00 out

GPT 5 Chat Details

$1.25 in / $10.00 out

More Comparisons

Top Anthropic pick

Claude Opus 4 vs GPT 5 Chat

$15.00/M in · Score 98.4

Top OpenAI pick

Claude Opus 4.5 vs GPT 5 Codex

$1.25/M in · Score 91.5

Anthropic

Claude Opus 4.6 vs GPT 5 Chat$5.00/MClaude Sonnet 4.6 vs GPT 5 Chat$3.00/MClaude 3.7 Sonnet vs GPT 5 Chat$3.00/MClaude 3.5 Sonnet vs GPT 5 Chat$6.00/M

OpenAI

Claude Opus 4.5 vs GPT 5$1.25/MClaude Opus 4.5 vs GPT 5 Image$10.00/MClaude Opus 4.5 vs GPT 5.4$2.50/MClaude Opus 4.5 vs GPT 4.1$2.00/M

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