Model comparison
GPT-5.1-Codex-Max vs MiMo-V2.5-Pro
Head-to-head evidence from 11 shared benchmark results across 5 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.
Public leaderboard positions: GPT-5.1-Codex-Max #90 (Estimated); MiMo-V2.5-Pro #14 (Supported). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. GPT-5.1-Codex-Max and MiMo-V2.5-Pro share 11 comparable benchmark results. 0 of 8 categories are comparable. 2 results are unique to GPT-5.1-Codex-Max; 20 to MiMo-V2.5-Pro.
Updated July 21, 2026- Shared results
- 11
- GPT-5.1-Codex-Max only
- 2
- MiMo-V2.5-Pro only
- 20
- Comparable categories
- 0 / 8
Benchmark data for GPT-5.1-Codex-Max and MiMo-V2.5-Pro is coming soon on BenchLM.
Confidence note. This is a partial-evidence comparison with 11 shared benchmark results across 5 evidence categories; 0 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.
Why this result
BenchLM has partial data for these models, but not enough overlapping benchmark coverage to produce a fair score-level comparison yet.
MiMo-V2.5-Pro has the larger context window at 1M, compared with 400K for GPT-5.1-Codex-Max.
Category breakdown
Exact category averages are shown below. Not measured means BenchLM does not have enough sourced public coverage for that model and category.
| Category | GPT-5.1-Codex-Max | Δ | MiMo-V2.5-Pro |
|---|---|---|---|
| Agentic | GPT-5.1-Codex-MaxNot measured | MarginNo overlap | MiMo-V2.5-Pro68.4 |
| Coding | GPT-5.1-Codex-MaxNot measured | MarginNo overlap | MiMo-V2.5-Pro57.2 |
| Knowledge | GPT-5.1-Codex-MaxNot measured | MarginNo overlap | MiMo-V2.5-Pro48.0 |
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | GPT-5.1-Codex-Max | MiMo-V2.5-Pro | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | GPT-5.1-Codex-Max$1.25 input / $10 output | MiMo-V2.5-ProNot available | A complete price comparison is not available. |
| Generation speedtokens per second | GPT-5.1-Codex-MaxNot available | MiMo-V2.5-ProNot available | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | GPT-5.1-Codex-MaxNot available | MiMo-V2.5-ProNot available | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | GPT-5.1-Codex-Max400K | MiMo-V2.5-Pro1M | MiMo-V2.5-Pro lists the larger context window. |
Benchmark Deep Dive
Agentic14 benchmarks
| Benchmark | GPT-5.1-Codex-Max | MiMo-V2.5-Pro | Result |
|---|---|---|---|
| τ²-bench resultsSource | 83% | 94.2% | MiMo-V2.5-Pro leads |
| Claw-EvalSource | — | 63.8% | Not comparable |
| GDPval-AASource | — | 1265 | Not comparable |
| τ³-bench resultsSource | — | 72.9% | Not comparable |
| Terminal-Bench 2.0Source | — | 68.4% | Not comparable |
| AA Agentic IndexSource | — | 29.1% | Not comparable |
| GDPval-AASource | — | 38.3% | Not comparable |
| APEX-Agents-AASource | — | 2.4% | Not comparable |
| Gert LabsSource | — | 62.70% | Not comparable |
| AA BriefcaseSource | — | 873 | Not comparable |
| AA ITBenchSource | — | 38.2% | Not comparable |
| terminalBenchHardSource | — | 43.2% | Not comparable |
| aaTerminalBench21Source | — | 65.2% | Not comparable |
| AA Harvey LABSource | — | 73.3% | Not comparable |
Coding5 benchmarks
Reasoning2 benchmarks
Knowledge9 benchmarks
| Benchmark | GPT-5.1-Codex-Max | MiMo-V2.5-Pro | Result |
|---|---|---|---|
| Artificial Analysis Intelligence IndexSource | 34.7% | 42.2% | MiMo-V2.5-Pro leads |
| AA-GPQA DiamondSource | 86.0% | 86.6% | MiMo-V2.5-Pro leads |
| AA-HLESource | 23.4% | 33.8% | MiMo-V2.5-Pro leads |
| AA-Omniscience IndexSource | -6.0% | 3.6% | MiMo-V2.5-Pro leads |
| AA-Omniscience AccuracySource | 39.2% | 22.6% | GPT-5.1-Codex-Max leads |
| AA-Omniscience Hallucination RateSource | 74.4% | 24.5% | MiMo-V2.5-Pro leads |
| HLESource | — | 48% | Not comparable |
| HLE w/o toolsSource | — | 34% | Not comparable |
| AA Openness IndexSource | — | 38.9% | Not comparable |
Multimodal2 benchmarks
Inst. Following1 benchmarks
| Benchmark | GPT-5.1-Codex-Max | MiMo-V2.5-Pro | Result |
|---|---|---|---|
| AA-IFBenchSource | 70.0% | 79.9% | MiMo-V2.5-Pro leads |
Frequently Asked Questions (3)
Can I compare GPT-5.1-Codex-Max and MiMo-V2.5-Pro on BenchLM yet?
Not fully yet. BenchLM is tracking both models, but the sourced benchmark breakdown for this comparison is still coming soon.
Why does this comparison show “coming soon”?
BenchLM only shows category winners and benchmark-level calls when we have sourced results that can be compared fairly. For these models, the public benchmark coverage is not complete enough yet.
What data is available for GPT-5.1-Codex-Max and MiMo-V2.5-Pro today?
GPT-5.1-Codex-Max: $1.25 input / $10.00 output per 1M tokens MiMo-V2.5-Pro: Pricing unavailable Both model pages still include creator, context window, reasoning mode, and other metadata while benchmark coverage fills in.
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