Step 3.5 Flash vs MiMo-V2.5-Pro
Step 3.5 Flash comes out ahead, 62 to 54 on our weighted score, and it is the cheaper option too.
- Our pick
StepFunStep 3.5 Flash
62/100- ECI—
- Price$0.10 / $0.30
- Context256K
XiaomiMiMo-V2.5-Pro
54/100- ECI—
- Price$0.435 / $0.87
- Context1.05M
Add a model
Make it a three-way comparison.
Step 3.5 Flash is our pick
Step 3.5 Flash is the better all-round choice, scoring 62/100 against MiMo-V2.5-Pro (54). It leads on price. MiMo-V2.5-Pro wins on context window. The score weighs price 50%, inputs & features 30%, context window 20%. None of the shared benchmarks cover every model here yet, so capability is left out of this verdict.
- CapabilityNot enough dataNo independent benchmark covers every model here yet
- Lowest priceStep 3.5 FlashStep 3.5 Flash $0.15 · MiMo-V2.5-Pro $0.544 per 1M tokens (3:1 blend)
- Longest contextMiMo-V2.5-ProMiMo-V2.5-Pro 1,048,576 · Step 3.5 Flash 256,000 tokens
- Widest inputsSame inputsStep 3.5 Flash: Text · MiMo-V2.5-Pro: Text
- Self-hostingAll open weightsEvery model here can be downloaded and run on your own hardware
| Measure | Weight | Step 3.5 Flash | MiMo-V2.5-Pro |
|---|---|---|---|
| Price | 50% | 89 | 62 |
| Inputs & features | 30% | 35 | 35 |
| Context window | 20% | 36 | 61 |
| Overall | 100% | 62/100 | 54/100 |
Left out because at least one model lacks the data: capability. The remaining weights were rescaled.
Every spec in one table
Highlighted cells lead their row. Dashes mean the data is not published.
| Specification | Step 3.5 FlashStepFun | MiMo-V2.5-ProXiaomi |
|---|---|---|
| Capability | ||
| Capabilities Index (ECI) | — | — |
| ECI rank | — | — |
| Price per million tokens | ||
| Input | $0.10 (best) | $0.435 |
| Output | $0.30 (best) | $0.87 |
| Cached input | $0.02 | $0.0036 (best) |
| Blended (3:1) | $0.15 (best) | $0.544 |
| Long-context rate | Same rate | Same rate |
| Price source | Official StepFun (Global) API | Official Xiaomi API |
| Limits | ||
| Context window | 256,000 tokens | 1,048,576 tokens (best) |
| Max output | 256,000 tokens (best) | 131,072 tokens |
| Inputs and features | ||
| Text | Yes | Yes |
| Images | No | No |
| PDFs | No | No |
| Audio | No | No |
| Video | No | No |
| Reasoning | Yeslow · high | Yes |
| Tool calling | Yes | Yes |
| Structured output | No | No |
| Availability | ||
| Weights | Open | Open |
| API model ID | step-3.5-flash | mimo-v2.5-pro |
| API providers | 8 | 20 (best) |
| Released | Jan 29, 2026 | Apr 22, 2026 |
| Knowledge cutoff | Jan 2025 | Dec 2024 |
What would a month cost?
Enter your expected volume in millions of tokens. List prices only; caching and batch discounts would lower these.
- Step 3.5 Flash$1.60
- MiMo-V2.5-Pro$6.09
Which should you choose?
Which is better: Step 3.5 Flash or MiMo-V2.5-Pro?
Step 3.5 Flash is the better all-round choice, scoring 62/100 against MiMo-V2.5-Pro (54). It leads on price. MiMo-V2.5-Pro wins on context window. The score weighs price 50%, inputs & features 30%, context window 20%. None of the shared benchmarks cover every model here yet, so capability is left out of this verdict.
Which is cheaper, Step 3.5 Flash or MiMo-V2.5-Pro?
Step 3.5 Flash is cheaper at $0.10 input / $0.30 output per million tokens (official StepFun (Global) API price). MiMo-V2.5-Pro costs $0.435 input / $0.87 output per million tokens (official Xiaomi API price). At a typical mix of three input tokens to one output token, that is $0.15 per million tokens for Step 3.5 Flash versus $0.544 for MiMo-V2.5-Pro (3.6× as much).
Which scores higher on benchmarks?
There is no independent benchmark that covers both models yet. Step 3.5 Flash has not been scored yet and MiMo-V2.5-Pro has not been scored yet.
Which is better for coding?
There are no published SWE-bench Verified results for Step 3.5 Flash and MiMo-V2.5-Pro yet, so there is no like-for-like coding score. Test both on a sample of your own tasks. Both support tool calling for agent workflows.
Which has the bigger context window?
MiMo-V2.5-Pro has the largest context window at 1,048,576 tokens, against 256,000 for Step 3.5 Flash. Maximum output per response: Step 3.5 Flash up to 256,000, MiMo-V2.5-Pro up to 131,072 tokens.
Which can read images, PDFs, audio or video?
Step 3.5 Flash accepts text; MiMo-V2.5-Pro accepts text. They handle the same number of input types.
Are any of these open source?
Yes, both publish their weights, so you can self-host them.
Which is newer?
MiMo-V2.5-Pro is the newest, released Apr 22, 2026. Step 3.5 Flash came out Jan 29, 2026. Knowledge cutoff: Step 3.5 Flash Jan 2025, MiMo-V2.5-Pro Dec 2024.
How do you decide the winner?
Each model gets a 0–100 score on capability (50%, independent benchmark results); price (25%, blended price per million tokens (3 input : 1 output), log scale); inputs & features (15%, image, PDF, audio and video input, tool calling, structured output and reasoning); context window (10%, maximum tokens per request, log scale). Dimensions missing for any model are dropped and the remaining weights rescaled, so every model is judged on the same evidence. Specs and prices come from public model listings and the labs’ own API pages; capability scores come from independent benchmark runs. Data updated Oct 4, 2026.
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