GPT-5.6 Terra vs MiMo V2.6 Flash: Benchmark Comparison
GPT-5.6 Terra has the higher score on 9 of 18 shared benchmarks; MiMo V2.6 Flash leads on 8.
The largest observed score gap is 39.94 pts on IOI , where GPT-5.6 Terra leads.
Reported ±1 standard-error ranges overlap on 14 of 18 shared benchmarks with comparable uncertainty data. This is not a pairwise statistical significance test.
Shared benchmark results
Scores and reported standard errors come from the latest visible Vals benchmark version available for both models.
| Benchmark | GPT-5.6 Terra | MiMo V2.6 Flash | Gap | Reported uncertainty |
|---|---|---|---|---|
| Vals Index | 53.09% ±1.29 | 53.23% ±1.10 | 0.15 pts | Reported ±1 SE ranges overlap |
| Harvey's Legal Agent Benchmark | 0.83% ±0.83 | 11.25% ±2.54 | 10.42 pts | Reported ±1 SE ranges do not overlap |
| Legal Research Bench | 41.35% ±3.42 | 37.98% ±3.37 | 3.36 pts | Reported ±1 SE ranges overlap |
| EMB | 66.20% ±3.11 | 65.46% ±2.71 | 0.75 pts | Reported ±1 SE ranges overlap |
| Finance Agent (v2) | 54.44% ±2.07 | 56.28% ±0.46 | 1.84 pts | Reported ±1 SE ranges overlap |
| Tax Agent Bench | 65.20% ±3.19 | 59.90% ±3.13 | 5.29 pts | Reported ±1 SE ranges overlap |
| MedCode | 43.41% ±2.17 | 41.06% ±2.03 | 2.36 pts | Reported ±1 SE ranges overlap |
| MedScribe | 82.87% ±1.95 | 85.28% ±1.99 | 2.41 pts | Reported ±1 SE ranges overlap |
| ProofBench v1.1 | 74.00% ±4.41 | 63.00% ±4.85 | 11.00 pts | Reported ±1 SE ranges do not overlap |
| Terminal-Bench Science | 10.00% ±3.61 | 4.29% ±2.44 | 5.71 pts | Reported ±1 SE ranges overlap |
| SAGE | 47.00% ±3.40 | 43.53% ±3.43 | 3.47 pts | Reported ±1 SE ranges overlap |
| Code Migration | 47.80% ±4.28 | 40.93% ±4.35 | 6.88 pts | Reported ±1 SE ranges overlap |
| IOI | 87.61% ±6.53 | 47.67% ±4.79 | 39.94 pts | Reported ±1 SE ranges do not overlap |
| ProgramBench | 0.50% ±0.50 | 0.50% ±0.50 | 0.00 pts | Reported ±1 SE ranges overlap |
| Terminal-Bench 4.0 | 22.73% ±2.31 | 24.24% ±1.51 | 1.52 pts | Reported ±1 SE ranges overlap |
| Vibe Code Bench v1.1 | 74.59% ±4.20 | 78.96% ±4.04 | 4.37 pts | Reported ±1 SE ranges overlap |
| CyberBench v1.1 | 72.08% ±5.41 | 75.36% ±5.42 | 3.27 pts | Reported ±1 SE ranges overlap |
| Public Benefits Bench v1.1 | 62.38% ±1.26 | 67.59% ±1.22 | 5.21 pts | Reported ±1 SE ranges do not overlap |
Performance by category
| Category | GPT-5.6 Terra average | MiMo V2.6 Flash average |
|---|---|---|
| Legal | 21.09% | 24.62% |
| Finance | 61.95% | 60.55% |
| Healthcare | 63.14% | 63.17% |
| Math | 74.00% | 63.00% |
| Science | 10.00% | 4.29% |
| Education | 47.00% | 43.53% |
| Coding | 46.65% | 38.46% |
| Cyber | 72.08% | 75.36% |
| Social Mobility | 62.38% | 67.59% |
Cost and latency
Cost per test appears only where the benchmark reports it for both models. Latency is the measured completion time for that benchmark.
| Benchmark | GPT-5.6 Terra cost | MiMo V2.6 Flash cost | GPT-5.6 Terra latency | MiMo V2.6 Flash latency |
|---|---|---|---|---|
| Vals Index | $5.78 | $0.20 | 35m39s | 58m02s |
| Harvey's Legal Agent Benchmark | $3.20 | $0.09 | 17m05s | 17m12s |
| Legal Research Bench | $7.91 | $0.07 | 1h10m | 15m20s |
| EMB | $2.19 | $0.11 | 13m33s | 25m22s |
| Finance Agent (v2) | $3.63 | $0.07 | 24m10s | 7m02s |
| Tax Agent Bench | $4.83 | $0.05 | 1h01m | 17m19s |
| MedCode | N/A | N/A | 18.41s | 93.37s |
| MedScribe | N/A | N/A | 35.53s | 74.48s |
| ProofBench v1.1 | $1.27 | $0.12 | 12m57s | 1h03m |
| Terminal-Bench Science | $5.19 | $0.24 | 2h04m | 3h59m |
| SAGE | N/A | N/A | 40.06s | 2m16s |
| Code Migration | $8.13 | $0.49 | 48m34s | 3h12m |
| IOI | $8.66 | $0.22 | 1h23m | 1h49m |
| ProgramBench | $5.38 | $0.47 | 33m36s | 3h22m |
| Terminal-Bench 4.0 | $5.60 | $0.22 | 31m29s | 2h25m |
| Vibe Code Bench v1.1 | $7.89 | $0.56 | 19m12s | 50m13s |
| CyberBench v1.1 | $3.31 | $0.05 | 17m04s | 28m22s |
| Public Benefits Bench v1.1 | $1.20 | $0.03 | 19m31s | 20m56s |
Results available only for GPT-5.6 Terra
- LegalBench
- MortgageTax
- TaxEval v2
- GPQA Diamond
- MMLU Pro
- MMMU Pro
- LiveCodeBench
- SkillsBench
- SWE-bench
- Vibe Code Bench 1-100
Results available only for MiMo V2.6 Flash
- BioMysteryBench
- MysteryMechanism
- SRE Bench