| Signal | GPT-5.1-Codex-Max | Delta | Grok 4.1 Fast |
|---|---|---|---|
Capabilities | 86 | -- | |
Context window size | 89 | -11 | |
Output Capacity | 85 | +11 | |
Pricing Tier | 10 | +10 | |
Recency | 100 | -- | |
Versatility | 50 | -- | |
| Overall Result | 2 wins | of 6 | 1 wins |
17
days ranked higher
2
days
11
days ranked higher
OpenAI
xAI
Grok 4.1 Fast saves you $580.00/month
That's $6960.00/year compared to GPT-5.1-Codex-Max at your current usage level of 100K calls/month.
| Metric | GPT-5.1-Codex-Max | Grok 4.1 Fast | Winner |
|---|---|---|---|
| Overall Score | 66 | 64 | GPT-5.1-Codex-Max |
| Rank | #24 | #34 | GPT-5.1-Codex-Max |
| Quality Rank | #24 | #34 | GPT-5.1-Codex-Max |
| Adoption Rank | #24 | #34 | GPT-5.1-Codex-Max |
| Parameters | -- | -- | -- |
| Context Window | 400K | 2000K | Grok 4.1 Fast |
| Pricing | $1.25/$10.00/M | $0.20/$0.50/M | -- |
| Signal Scores | |||
| Capabilities | 86 | 86 | GPT-5.1-Codex-Max |
| Context window size | 89 | 100 | Grok 4.1 Fast |
| Output Capacity | 85 | 75 | GPT-5.1-Codex-Max |
| Pricing Tier | 10 | 1 | GPT-5.1-Codex-Max |
| Recency | 100 | 100 | GPT-5.1-Codex-Max |
| Versatility | 50 | 50 | GPT-5.1-Codex-Max |
GPT-5.1-Codex-Max and Grok 4.1 Fast are extremely close in overall performance (only 1.7999999999999972 points apart). Your best choice depends entirely on which specific strengths matter most for your use case.
Best for Quality
GPT-5.1-Codex-Max
Marginally better benchmark scores; both are excellent
Best for Cost
Grok 4.1 Fast
94% lower pricing; better value at scale
Best for Reliability
GPT-5.1-Codex-Max
Higher uptime and faster response speeds
Best for Prototyping
GPT-5.1-Codex-Max
Stronger community support and better developer experience
Best for Production
GPT-5.1-Codex-Max
Wider enterprise adoption and proven at scale
by OpenAI
GPT-5.1-Codex-Max currently scores higher (66 vs 64), but the best choice depends on your specific use case, budget, and requirements.
GPT-5.1-Codex-Max is ranked #24 and Grok 4.1 Fast is ranked #34. Rankings are based on a composite score from multiple signals including benchmarks, community sentiment, and adoption metrics.
Compare the detailed pricing breakdown above to see which model offers better value for your usage pattern.