Compare · ModelsLive · 2 picked · head to head
GPT-5.1-Codex vs GPT-5.2-Codex
Side by side · benchmarks, pricing, and signals you can act on.
Winner summary
GPT-5.2-Codex wins on 6/8 benchmarks
GPT-5.2-Codex wins 6 of 8 shared benchmarks. Leads in reasoning · language · math.
Category leads
coding·GPT-5.1-Codexreasoning·GPT-5.2-Codexlanguage·GPT-5.2-Codexmath·GPT-5.2-Codexknowledge·GPT-5.2-Codex
Hype vs Reality
Attention vs performance
GPT-5.1-Codex
#21 by perf·no signal
GPT-5.2-Codex
#13 by perf·no signal
Best value
GPT-5.1-Codex
1.4x better value than GPT-5.2-Codex
GPT-5.1-Codex
12.2 pts/$
$5.63/M
GPT-5.2-Codex
9.0 pts/$
$7.88/M
Vendor risk
Who is behind the model
OpenAI
$840.0B·Tier 1
OpenAI
$840.0B·Tier 1
Head to head
8 benchmarks · 2 models
GPT-5.1-CodexGPT-5.2-Codex
LiveBench · Agentic Coding
GPT-5.1-Codex leads by +1.7
GPT-5.1-Codex
53.3
GPT-5.2-Codex
51.7
LiveBench · Coding
GPT-5.2-Codex leads by +11.8
GPT-5.1-Codex
71.8
GPT-5.2-Codex
83.6
LiveBench · Data Analysis
GPT-5.2-Codex leads by +17.5
GPT-5.1-Codex
60.8
GPT-5.2-Codex
78.2
LiveBench · If
GPT-5.2-Codex leads by +3.1
GPT-5.1-Codex
63.4
GPT-5.2-Codex
66.5
LiveBench · Language
GPT-5.2-Codex leads by +4.2
GPT-5.1-Codex
69.5
GPT-5.2-Codex
73.7
LiveBench · Mathematics
GPT-5.2-Codex leads by +9.2
GPT-5.1-Codex
79.6
GPT-5.2-Codex
88.8
LiveBench · Overall
GPT-5.2-Codex leads by +5.7
GPT-5.1-Codex
68.6
GPT-5.2-Codex
74.3
LiveBench · Reasoning
GPT-5.1-Codex leads by +4.3
GPT-5.1-Codex
82.0
GPT-5.2-Codex
77.7
Full benchmark table
| Benchmark | GPT-5.1-Codex | GPT-5.2-Codex |
|---|---|---|
LiveBench · Agentic Coding | 53.3 | 51.7 |
LiveBench · Coding | 71.8 | 83.6 |
LiveBench · Data Analysis | 60.8 | 78.2 |
LiveBench · If | 63.4 | 66.5 |
LiveBench · Language | 69.5 | 73.7 |
LiveBench · Mathematics | 79.6 | 88.8 |
LiveBench · Overall | 68.6 | 74.3 |
LiveBench · Reasoning | 82.0 | 77.7 |
Pricing · per 1M tokens · projected $/mo at 10M tokens
| Model | Input | Output | Context | Projected $/mo |
|---|---|---|---|---|
| GPT-5.1-Codex | $1.25 | $10.00 | 400K tokens (~200 books) | $34.38 |
| GPT-5.2-Codex | $1.75 | $14.00 | 400K tokens (~200 books) | $48.13 |