Claude Sonnet 5.5 vs MiMo V2.6 Flash: Benchmark Comparison
Claude Sonnet 5.5 has the higher score on 18 of 21 shared benchmarks; MiMo V2.6 Flash leads on 3.
The largest observed score gap is 41.43 pts on Terminal-Bench Science , where Claude Sonnet 5.5 leads.
Reported ±1 standard-error ranges overlap on 1 of 21 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 | Claude Sonnet 5.5 | MiMo V2.6 Flash | Gap | Reported uncertainty |
|---|---|---|---|---|
| Vals Index | 67.04% ±0.92 | 53.23% ±1.10 | 13.81 pts | Reported ±1 SE ranges do not overlap |
| Harvey's Legal Agent Benchmark | 2.92% ±1.36 | 11.25% ±2.54 | 8.33 pts | Reported ±1 SE ranges do not overlap |
| Legal Research Bench | 48.08% ±3.47 | 37.98% ±3.37 | 10.10 pts | Reported ±1 SE ranges do not overlap |
| EMB | 75.71% ±2.44 | 65.46% ±2.71 | 10.25 pts | Reported ±1 SE ranges do not overlap |
| Finance Agent (v2) | 58.10% ±0.67 | 56.28% ±0.46 | 1.83 pts | Reported ±1 SE ranges do not overlap |
| Tax Agent Bench | 73.39% ±2.98 | 59.90% ±3.13 | 13.49 pts | Reported ±1 SE ranges do not overlap |
| MedCode | 52.92% ±2.12 | 41.06% ±2.03 | 11.86 pts | Reported ±1 SE ranges do not overlap |
| MedScribe | 91.10% ±1.96 | 85.28% ±1.99 | 5.83 pts | Reported ±1 SE ranges do not overlap |
| ProofBench v1.1 | 100.00% ±0.00 | 63.00% ±4.85 | 37.00 pts | Reported ±1 SE ranges do not overlap |
| BioMysteryBench | 81.11% ±0.64 | 69.26% ±0.98 | 11.85 pts | Reported ±1 SE ranges do not overlap |
| MysteryMechanism | 49.10% ±3.36 | 21.62% ±2.77 | 27.48 pts | Reported ±1 SE ranges do not overlap |
| Terminal-Bench Science | 45.71% ±6.00 | 4.29% ±2.44 | 41.43 pts | Reported ±1 SE ranges do not overlap |
| SAGE | 51.77% ±3.41 | 43.53% ±3.43 | 8.24 pts | Reported ±1 SE ranges do not overlap |
| Code Migration | 69.83% ±4.26 | 40.93% ±4.35 | 28.90 pts | Reported ±1 SE ranges do not overlap |
| IOI | 83.06% ±3.74 | 47.67% ±4.79 | 35.39 pts | Reported ±1 SE ranges do not overlap |
| ProgramBench | 6.50% ±1.75 | 0.50% ±0.50 | 6.00 pts | Reported ±1 SE ranges do not overlap |
| Terminal-Bench 4.0 | 64.14% ±1.01 | 24.24% ±1.51 | 39.90 pts | Reported ±1 SE ranges do not overlap |
| Vibe Code Bench v1.1 | 92.39% ±1.26 | 78.96% ±4.04 | 13.43 pts | Reported ±1 SE ranges do not overlap |
| CyberBench v1.1 | 59.58% ±5.21 | 75.36% ±5.42 | 15.77 pts | Reported ±1 SE ranges do not overlap |
| SRE Bench | 30.15% ±2.84 | 4.20% ±1.24 | 25.95 pts | Reported ±1 SE ranges do not overlap |
| Public Benefits Bench v1.1 | 67.19% ±1.22 | 67.59% ±1.22 | 0.41 pts | Reported ±1 SE ranges overlap |
Performance by category
| Category | Claude Sonnet 5.5 average | MiMo V2.6 Flash average |
|---|---|---|
| Legal | 25.50% | 24.62% |
| Finance | 69.07% | 60.55% |
| Healthcare | 72.01% | 63.17% |
| Math | 100.00% | 63.00% |
| Science | 58.64% | 31.72% |
| Education | 51.77% | 43.53% |
| Coding | 63.18% | 38.46% |
| Cyber | 44.87% | 39.78% |
| Social Mobility | 67.19% | 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 | Claude Sonnet 5.5 cost | MiMo V2.6 Flash cost | Claude Sonnet 5.5 latency | MiMo V2.6 Flash latency |
|---|---|---|---|---|
| Vals Index | $21.34 | $0.20 | 1h18m | 58m02s |
| Harvey's Legal Agent Benchmark | $16.61 | $0.09 | 57m44s | 17m12s |
| Legal Research Bench | $14.83 | $0.07 | 1h33m | 15m20s |
| EMB | $8.79 | $0.11 | 36m45s | 25m22s |
| Finance Agent (v2) | $6.55 | $0.07 | 31m43s | 7m02s |
| Tax Agent Bench | $9.25 | $0.05 | 59m21s | 17m19s |
| MedCode | N/A | N/A | 3m59s | 93.37s |
| MedScribe | N/A | N/A | 5m07s | 74.48s |
| ProofBench v1.1 | $0.56 | $0.12 | 5m48s | 1h03m |
| BioMysteryBench | $3.74 | $0.05 | 18m06s | 28m28s |
| MysteryMechanism | $3.45 | $0.06 | 23m30s | 35m08s |
| Terminal-Bench Science | $30.43 | $0.24 | 2h39m | 3h59m |
| SAGE | N/A | N/A | 113.42s | 2m16s |
| Code Migration | $75.83 | $0.49 | 3h20m | 3h12m |
| IOI | $7.52 | $0.22 | 45m51s | 1h49m |
| ProgramBench | $35.86 | $0.47 | 2h07m | 3h22m |
| Terminal-Bench 4.0 | $16.51 | $0.22 | 1h22m | 2h25m |
| Vibe Code Bench v1.1 | $31.25 | $0.56 | 1h01m | 50m13s |
| CyberBench v1.1 | $4.42 | $0.05 | 33m53s | 28m22s |
| SRE Bench | $26.52 | $0.40 | 1h55m | 3h22m |
| Public Benefits Bench v1.1 | $4.25 | $0.03 | 1h15m | 20m56s |