Compare · ModelsLive · 2 picked · head to head
GPT-5.2-Codex vs Claude Opus 4.5
Side by side · benchmarks, pricing, and signals you can act on.
Winner summary
Claude Opus 4.5 wins on 1/1 benchmarks
Claude Opus 4.5 wins 1 of 1 shared benchmarks. Leads in agentic.
Category leads
agentic·Claude Opus 4.5
Hype vs Reality
Attention vs performance
GPT-5.2-Codex
#15 by perf·no signal
Claude Opus 4.5
#113 by perf·no signal
Best value
GPT-5.2-Codex
3.0x better value than Claude Opus 4.5
GPT-5.2-Codex
9.0 pts/$
$7.88/M
Claude Opus 4.5
3.0 pts/$
$15.00/M
Vendor risk
Who is behind the model
OpenAI
$840.0B·Tier 1
Anthropic
$380.0B·Tier 1
Head to head
1 benchmark · 2 models
GPT-5.2-CodexClaude Opus 4.5
SWE-Bench Pro (Public)
Claude Opus 4.5 leads by +4.9
GPT-5.2-Codex
41.0
Claude Opus 4.5
45.9
Full benchmark table
| Benchmark | GPT-5.2-Codex | Claude Opus 4.5 |
|---|---|---|
SWE-Bench Pro (Public) | 41.0 | 45.9 |
Pricing · per 1M tokens · projected $/mo at 10M tokens
| Model | Input | Output | Context | Projected $/mo |
|---|---|---|---|---|
| $1.75 | $14.00 | 400K tokens (~200 books) | $48.13 | |
| $5.00 | $25.00 | 200K tokens (~100 books) | $100.00 |