Compare · ModelsLive · 2 picked · head to head
Claude Sonnet 5.5 vs GPT-5.2-Codex
Side by side · benchmarks, pricing, and signals you can act on.
Winner summary
GPT-5.2-Codex wins on 0/0 benchmarks
Not enough overlapping benchmarks to declare a winner yet · Claude Sonnet 5.5 · GPT-5.2-Codex are still filling in scores.
Hype vs Reality
Attention vs performance
Claude Sonnet 5.5
#34 by perf·#12 by attention
GPT-5.2-Codex
#17 by perf·#10 by attention
Best value
Claude Sonnet 5.5
1.2x better value than GPT-5.2-Codex
Claude Sonnet 5.5
11.0 pts/$
$6.00/M
GPT-5.2-Codex
9.0 pts/$
$7.88/M
Vendor risk
Who is behind the model
Anthropic
$965.0B·Tier 1
OpenAI
$840.0B·Tier 1
Pricing · per 1M tokens · projected $/mo at 10M tokens
| Model | Input | Output | Context | Projected $/mo |
|---|---|---|---|---|
| $2.00 | $10.00 | 1.0M tokens (~500 books) | $40.00 | |
| $1.75 | $14.00 | 400K tokens (~200 books) | $48.13 |