Compare · ModelsLive · 2 picked · head to head
GPT-5.1-Codex-Max vs GPT-5.1-Codex
Side by side · benchmarks, pricing, and signals you can act on.
Winner summary
GPT-5.1-Codex-Max wins on 7/8 benchmarks
GPT-5.1-Codex-Max wins 7 of 8 shared benchmarks. Leads in coding · language · math.
Category leads
coding·GPT-5.1-Codex-Maxreasoning·GPT-5.1-Codexlanguage·GPT-5.1-Codex-Maxmath·GPT-5.1-Codex-Maxknowledge·GPT-5.1-Codex-Max
Hype vs Reality
Attention vs performance
GPT-5.1-Codex-Max
#10 by perf·no signal
GPT-5.1-Codex
#21 by perf·no signal
Best value
GPT-5.1-Codex-Max
1.0x better value than GPT-5.1-Codex
GPT-5.1-Codex-Max
12.8 pts/$
$5.63/M
GPT-5.1-Codex
12.2 pts/$
$5.63/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-Codex-MaxGPT-5.1-Codex
LiveBench · Agentic Coding
GPT-5.1-Codex-Max leads by +3.3
GPT-5.1-Codex-Max
56.7
GPT-5.1-Codex
53.3
LiveBench · Coding
GPT-5.1-Codex-Max leads by +9.6
GPT-5.1-Codex-Max
81.4
GPT-5.1-Codex
71.8
LiveBench · Data Analysis
GPT-5.1-Codex leads by +5.9
GPT-5.1-Codex-Max
54.9
GPT-5.1-Codex
60.8
LiveBench · If
GPT-5.1-Codex-Max leads by +3.7
GPT-5.1-Codex-Max
67.1
GPT-5.1-Codex
63.4
LiveBench · Language
GPT-5.1-Codex-Max leads by +5.9
GPT-5.1-Codex-Max
75.4
GPT-5.1-Codex
69.5
LiveBench · Mathematics
GPT-5.1-Codex-Max leads by +4.1
GPT-5.1-Codex-Max
83.7
GPT-5.1-Codex
79.6
LiveBench · Overall
GPT-5.1-Codex-Max leads by +3.3
GPT-5.1-Codex-Max
72.0
GPT-5.1-Codex
68.6
LiveBench · Reasoning
GPT-5.1-Codex-Max leads by +2.6
GPT-5.1-Codex-Max
84.6
GPT-5.1-Codex
82.0
Full benchmark table
| Benchmark | GPT-5.1-Codex-Max | GPT-5.1-Codex |
|---|---|---|
LiveBench · Agentic Coding | 56.7 | 53.3 |
LiveBench · Coding | 81.4 | 71.8 |
LiveBench · Data Analysis | 54.9 | 60.8 |
LiveBench · If | 67.1 | 63.4 |
LiveBench · Language | 75.4 | 69.5 |
LiveBench · Mathematics | 83.7 | 79.6 |
LiveBench · Overall | 72.0 | 68.6 |
LiveBench · Reasoning | 84.6 | 82.0 |
Pricing · per 1M tokens · projected $/mo at 10M tokens
| Model | Input | Output | Context | Projected $/mo |
|---|---|---|---|---|
| GPT-5.1-Codex-Max | $1.25 | $10.00 | 400K tokens (~200 books) | $34.38 |
| GPT-5.1-Codex | $1.25 | $10.00 | 400K tokens (~200 books) | $34.38 |
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