Model comparison
GPT-5.5 Pro vs MiMo-V2-Flash
Head-to-head evidence from 1 shared benchmark result across 1 category. Overall scores shown here use the public BenchAlign v5 ranking lane.
Public leaderboard positions: GPT-5.5 Pro #38 (Estimated); MiMo-V2-Flash #91 (Supported). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. GPT-5.5 Pro and MiMo-V2-Flash share 1 comparable benchmark result. 1 of 8 categories are comparable. 6 results are unique to GPT-5.5 Pro; 18 to MiMo-V2-Flash.
Updated July 22, 2026- Shared results
- 1
- GPT-5.5 Pro only
- 6
- MiMo-V2-Flash only
- 18
- Comparable categories
- 1 / 8
Pick GPT-5.5 Pro if you want the stronger benchmark profile. MiMo-V2-Flash only becomes the better choice if knowledge is the priority or you want the cheaper token bill.
Confidence note. This is a partial-evidence comparison with 1 shared benchmark result across 1 evidence category; 1 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.
Why this result
GPT-5.5 Pro is clearly ahead on the BenchAlign aggregate, 63.69 to 54.06. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
GPT-5.5 Pro is also the more expensive model on tokens at $30.00 input / $180.00 output per 1M tokens, versus $0.00 input / $0.00 output per 1M tokens for MiMo-V2-Flash. That is roughly Infinityx on output cost alone. GPT-5.5 Pro gives you the larger context window at 1M, compared with 256K for MiMo-V2-Flash.
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-5.5 Pro | Δ | MiMo-V2-Flash |
|---|---|---|---|
| Knowledge | GPT-5.5 Pro57.2 | Margin→ 27.5 | MiMo-V2-Flash84.7 |
| Agentic | GPT-5.5 Pro90.1 | MarginNo overlap | MiMo-V2-FlashNot measured |
| Coding | GPT-5.5 ProNot measured | MarginNo overlap | MiMo-V2-Flash73.4 |
| Math | GPT-5.5 Pro48.1 | MarginNo overlap | MiMo-V2-FlashNot measured |
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | GPT-5.5 Pro | MiMo-V2-Flash | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | GPT-5.5 Pro$30 input / $180 output | MiMo-V2-Flash$0 input / $0 output | MiMo-V2-Flash has the lower combined listed price. |
| Generation speedtokens per second | GPT-5.5 ProNot available | MiMo-V2-Flash129 tok/s | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | GPT-5.5 ProNot available | MiMo-V2-Flash2.14 s | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | GPT-5.5 Pro1M | MiMo-V2-Flash256K | GPT-5.5 Pro lists the larger context window. |
Benchmark Deep Dive
Agentic5 benchmarks
Coding3 benchmarks
Reasoning2 benchmarks
KnowledgeMiMo-V2-Flash wins10 benchmarks
| Benchmark | GPT-5.5 Pro | MiMo-V2-Flash | Result |
|---|---|---|---|
| HLESource | 57.2% | — | Not comparable |
| HLE w/o toolsSource | 43.1% | — | Not comparable |
| GPQASource | — | 83.7% | Not comparable |
| MMLU-ProSource | — | 84.9% | Not comparable |
| Artificial Analysis Intelligence IndexSource | — | 24.7% | Not comparable |
| AA-GPQA DiamondSource | — | 65.6% | Not comparable |
| AA-HLESource | — | 8.0% | Not comparable |
| AA-Omniscience IndexSource | — | -48.5% | Not comparable |
| AA-Omniscience AccuracySource | — | 15.2% | Not comparable |
| AA-Omniscience Hallucination RateSource | — | 75.1% | Not comparable |
Math4 benchmarks
Inst. Following1 benchmarks
| Benchmark | GPT-5.5 Pro | MiMo-V2-Flash | Result |
|---|---|---|---|
| AA-IFBenchSource | — | 39.9% | Not comparable |
Frequently Asked Questions (2)
Which is better, GPT-5.5 Pro or MiMo-V2-Flash?
GPT-5.5 Pro is ahead on BenchLM's BenchAlign leaderboard, 63.69 to 54.06.
Which is better for knowledge tasks, GPT-5.5 Pro or MiMo-V2-Flash?
MiMo-V2-Flash has the edge for knowledge tasks in this comparison, averaging 84.7 versus 57.2. GPT-5.5 Pro stays close enough that the answer can still flip depending on your workload.
Related Comparisons
Explore More
Choose a model with this week’s evidence
Join 2,000+ readers for ranking moves, pricing changes, and the claims that still need proof.
One email each week. Unsubscribe anytime.