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Comparison

Claude Sonnet 4.6 vs GPT 5 Codex

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

Quality Benchmarks

LiveBench / 0-100

Coding68 / 92Math87 / 92Reasoning92 / 92Language66 / 92

Claude Sonnet 4.6

78.1Frontier

GPT 5 Codex

91.5Frontier

Claude Sonnet 4.6
GPT 5 Codex

Input Price (per 1M)

$3.00
$1.25
58% less

Output Price (per 1M)

$15.00
$10.00
33% less

Context Window

1M
2.5x
400K

Max Output

128K
128K

Anthropic

Claude Sonnet 4.6

vs

OpenAI

GPT 5 Codex

Pricing per 1M Tokens

$3.00

Input

Input

$1.25

58% cheaper

Input

$15.00

Output

Output

$10.00

33% cheaper

Output

Token Limits

Context

1M

Context

Context

400K

Max Output

128K

Max Output

Max Output

128K

VisionTools
VisionTools

Claude Sonnet 4.6 Details

$3.00 in / $15.00 out

GPT 5 Codex Details

$1.25 in / $10.00 out

Compare Models

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Claude Opus 4 vs GPT 5 Codex

$15.00/M in · Score 98.4

Top OpenAI pick

Claude Sonnet 4.6 vs GPT 5

$1.25/M in · Score 91.5

Anthropic

Claude Opus 4.6 vs GPT 5 Codex$5.00/MClaude 3.7 Sonnet vs GPT 5 Codex$3.00/MClaude Opus 4.5 vs GPT 5 Codex$5.00/MClaude 3.5 Sonnet vs GPT 5 Codex$6.00/M

OpenAI

Claude Sonnet 4.6 vs GPT 5 Image$10.00/MClaude Sonnet 4.6 vs GPT 5 Chat$1.25/MClaude Sonnet 4.6 vs GPT 5.4$2.50/MClaude Sonnet 4.6 vs GPT 4.1$2.00/M