Compare · ModelsLive · 2 picked · head to head
Claude Opus 5.5 vs GPT-5.2-Codex
Side by side · benchmarks, pricing, and signals you can act on.
Winner summary
Claude Opus 5.5 wins on 0/0 benchmarks
Not enough overlapping benchmarks to declare a winner yet · Claude Opus 5.5 · GPT-5.2-Codex are still filling in scores.
Hype vs Reality
Attention vs performance
Claude Opus 5.5
#3 by perf·#9 by attention
GPT-5.2-Codex
#17 by perf·#4 by attention
Best value
GPT-5.2-Codex
1.3x better value than Claude Opus 5.5
Claude Opus 5.5
6.9 pts/$
$12.00/M
GPT-5.2-Codex
9.0 pts/$
$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 |
|---|---|---|---|---|
| $4.00 | $20.00 | 1.0M tokens (~500 books) | $80.00 | |
| $1.75 | $14.00 | 400K tokens (~200 books) | $48.13 |
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