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Comparison · 2 models · Updated Nov 2, 2026

Step 3.5 Flash 2603 vs MiMo-V2-Flash

Too close to call on our weighted score (Step 3.5 Flash 2603 63, MiMo-V2-Flash 60). The right pick depends on what you value most.

  1. StepFun

    Step 3.5 Flash 2603

    Released Apr 2, 2026

    63/100
    • ECI—
    • Price$0.10 / $0.30
    • Context256K
    Full specs Remove Step 3.5 Flash 2603

  2. Xiaomi

    MiMo-V2-Flash

    Released Dec 16, 2025

    60/100
    • ECI—
    • Price$0.10 / $0.30
    • Context262K
    Full specs Remove MiMo-V2-Flash

  3. Add a model

    Make it a three-way comparison.

01 — Verdict

Too close to call

It is close. Our weighted score puts them within 3 points (Step 3.5 Flash 2603 63/100, MiMo-V2-Flash 60/100), so choose by what matters most for your work: Step 3.5 Flash 2603 on price and MiMo-V2-Flash for long inputs. 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 priceSame priceStep 3.5 Flash 2603 $0.15 · MiMo-V2-Flash $0.15 per 1M tokens (3:1 blend)
  • Longest contextMiMo-V2-FlashMiMo-V2-Flash 262,144 · Step 3.5 Flash 2603 256,000 tokens
  • Widest inputsSame inputsStep 3.5 Flash 2603: Text · MiMo-V2-Flash: Text
  • Self-hostingAll open weightsEvery model here can be downloaded and run on your own hardware
How the score is built
MeasureWeightStep 3.5 Flash 2603MiMo-V2-Flash
Price50%8585
Inputs & features30%4535
Context window20%3637
Overall100%63/10060/100

Left out because at least one model lacks the data: capability. The remaining weights were rescaled.

02 — Side by side

Every spec in one table

Highlighted cells lead their row. Dashes mean the data is not published.

Step 3.5 Flash 2603 vs MiMo-V2-Flash specifications side by side
SpecificationStep 3.5 Flash 2603StepFunMiMo-V2-FlashXiaomi
Capability
Capabilities Index (ECI)——
ECI rank——
Price per million tokens
Input$0.10$0.10
Output$0.30$0.30
Cached input$0.02—
Blended (3:1)$0.15$0.15
Long-context rateSame rateSame rate
Price sourceOfficial StepFun (Global) APIMedian of 3 providers
Limits
Context window256,000 tokens262,144 tokens (best)
Max output256,000 tokens (best)65,536 tokens
Inputs and features
TextYesYes
ImagesNoNo
PDFsNoNo
AudioNoNo
VideoNoNo
ReasoningYeslow · highYes
Tool callingYesYes
Structured outputYesNo
Availability
WeightsOpenOpen
API model IDstep-3.5-flash-2603—
API providers44
ReleasedApr 2, 2026Dec 16, 2025
Knowledge cutoffJan 2025Dec 1, 2024
03 — Cost

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 2603$1.60
  • MiMo-V2-Flash$1.60
04 — Questions

Which should you choose?

Which is better: Step 3.5 Flash 2603 or MiMo-V2-Flash?

It is close. Our weighted score puts them within 3 points (Step 3.5 Flash 2603 63/100, MiMo-V2-Flash 60/100), so choose by what matters most for your work: Step 3.5 Flash 2603 on price and MiMo-V2-Flash for long inputs. 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 2603 or MiMo-V2-Flash?

Step 3.5 Flash 2603 and MiMo-V2-Flash cost the same: $0.10 input / $0.30 output per million tokens.

Which scores higher on benchmarks?

There is no independent benchmark that covers both models yet. Step 3.5 Flash 2603 has not been scored yet and MiMo-V2-Flash has not been scored yet.

Which is better for coding?

There are no published SWE-bench Verified results for Step 3.5 Flash 2603 and MiMo-V2-Flash 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-Flash has the largest context window at 262,144 tokens, against 256,000 for Step 3.5 Flash 2603. Maximum output per response: Step 3.5 Flash 2603 up to 256,000, MiMo-V2-Flash up to 65,536 tokens.

Which can read images, PDFs, audio or video?

Step 3.5 Flash 2603 accepts text; MiMo-V2-Flash 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?

Step 3.5 Flash 2603 is the newest, released Apr 2, 2026. MiMo-V2-Flash came out Dec 16, 2025. Knowledge cutoff: Step 3.5 Flash 2603 Jan 2025, MiMo-V2-Flash Dec 1, 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 Nov 2, 2026.

05 — Keep comparing

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