MiMo-V2-Pro vs Mistral Small 4 vs Grok 4.20 (Non-Reasoning)
Mistral Small 4 comes out ahead, 65 to 52 and 42 on our weighted score, and it is the cheaper option too.
XiaomiMiMo-V2-Pro
42/100- ECI—
- Price$1.00 / $3.00
- Context1.05M
- Our pick
Mistral AIMistral Small 4
65/100- ECI—
- Price$0.15 / $0.60
- Context256K
xAIGrok 4.20 (Non-Reasoning)
52/100- ECI—
- Price$1.25 / $2.50
- Context1M
Mistral Small 4 is our pick
Mistral Small 4 is the better all-round choice, scoring 65/100 against Grok 4.20 (Non-Reasoning) (52) and MiMo-V2-Pro (42). It leads on price. 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 priceMistral Small 4Mistral Small 4 $0.263 · MiMo-V2-Pro $1.50 · Grok 4.20 (Non-Reasoning) $1.56 per 1M tokens (3:1 blend)
- Longest contextMiMo-V2-ProMiMo-V2-Pro 1,048,576 · Grok 4.20 (Non-Reasoning) 1,000,000 · Mistral Small 4 256,000 tokens
- Widest inputsGrok 4.20 (Non-Reasoning)MiMo-V2-Pro: Text · Mistral Small 4: Text, Images · Grok 4.20 (Non-Reasoning): Text, Images, PDFs
- Self-hostingMistral Small 4Publishes downloadable weights
| Measure | Weight | MiMo-V2-Pro | Mistral Small 4 | Grok 4.20 (Non-Reasoning) |
|---|---|---|---|---|
| Price | 50% | 40 | 74 | 39 |
| Inputs & features | 30% | 35 | 70 | 70 |
| Context window | 20% | 61 | 36 | 60 |
| Overall | 100% | 42/100 | 65/100 | 52/100 |
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 | MiMo-V2-ProXiaomi | Mistral Small 4Mistral AI | Grok 4.20 (Non-Reasoning)xAI |
|---|---|---|---|
| Capability | |||
| Capabilities Index (ECI) | — | — | — |
| ECI rank | — | — | — |
| Price per million tokens | |||
| Input | $1.00 | $0.15 (best) | $1.25 |
| Output | $3.00 | $0.60 (best) | $2.50 |
| Cached input | — | $0.015 (best) | $0.20 |
| Blended (3:1) | $1.50 | $0.263 (best) | $1.56 |
| Long-context rate | Same rate | Same rate | Over 200K: $2.50 / $5.00 |
| Price source | Median of 1 providers | Official Mistral API | Official xAI API |
| Limits | |||
| Context window | 1,048,576 tokens (best) | 256,000 tokens | 1,000,000 tokens |
| Max output | 131,072 tokens | 256,000 tokens (best) | 30,000 tokens |
| Inputs and features | |||
| Text | Yes | Yes | Yes |
| Images | No | Yes | Yes |
| PDFs | No | No | Yes |
| Audio | No | No | No |
| Video | No | No | No |
| Reasoning | Yes | Yeshigh | No |
| Tool calling | Yes | Yes | Yes |
| Structured output | No | Yes | Yes |
| Availability | |||
| Weights | Proprietary | Open | Proprietary |
| API model ID | — | mistral-small-2603 | grok-4.20-0309-non-reasoning |
| API providers | 2 | 21 (best) | 13 |
| Released | Mar 18, 2026 | Mar 16, 2026 | Mar 9, 2026 |
| Knowledge cutoff | Dec 2024 | Jun 2025 | — |
What would a month cost?
Enter your expected volume in millions of tokens. List prices only; caching and batch discounts would lower these.
- MiMo-V2-Pro$16.00
- Mistral Small 4$2.70
- Grok 4.20 (Non-Reasoning)$17.50
Which should you choose?
Which is better: MiMo-V2-Pro, Mistral Small 4 or Grok 4.20 (Non-Reasoning)?
Mistral Small 4 is the better all-round choice, scoring 65/100 against Grok 4.20 (Non-Reasoning) (52) and MiMo-V2-Pro (42). It leads on price. 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, MiMo-V2-Pro, Mistral Small 4 or Grok 4.20 (Non-Reasoning)?
Mistral Small 4 is cheaper at $0.15 input / $0.60 output per million tokens (official Mistral API price). MiMo-V2-Pro costs $1.00 input / $3.00 output per million tokens (median across 1 API provider); Grok 4.20 (Non-Reasoning) costs $1.25 input / $2.50 output per million tokens (official xAI API price). At a typical mix of three input tokens to one output token, that is $0.263 per million tokens for Mistral Small 4 versus $1.50 for MiMo-V2-Pro (5.7× as much) and $1.56 for Grok 4.20 (Non-Reasoning) (6× as much).
Which scores higher on benchmarks?
There is no independent benchmark that covers all three models yet. MiMo-V2-Pro has not been scored yet, Mistral Small 4 has not been scored yet and Grok 4.20 (Non-Reasoning) has not been scored yet.
Which is better for coding?
There are no published SWE-bench Verified results for MiMo-V2-Pro, Mistral Small 4 and Grok 4.20 (Non-Reasoning) yet, so there is no like-for-like coding score. Test both on a sample of your own tasks. All three support tool calling for agent workflows.
Which has the bigger context window?
MiMo-V2-Pro has the largest context window at 1,048,576 tokens, against 1,000,000 for Grok 4.20 (Non-Reasoning) and 256,000 for Mistral Small 4. Maximum output per response: MiMo-V2-Pro up to 131,072, Mistral Small 4 up to 256,000, Grok 4.20 (Non-Reasoning) up to 30,000 tokens.
Which can read images, PDFs, audio or video?
MiMo-V2-Pro accepts text; Mistral Small 4 accepts text and images; Grok 4.20 (Non-Reasoning) accepts text, images and PDFs. Grok 4.20 (Non-Reasoning) handles the widest range of inputs.
Are any of these open source?
Mistral Small 4 publishes its weights and can be self-hosted; MiMo-V2-Pro and Grok 4.20 (Non-Reasoning) is proprietary.
Which is newer?
MiMo-V2-Pro is the newest, released Mar 18, 2026. Mistral Small 4 came out Mar 16, 2026; Grok 4.20 (Non-Reasoning) came out Mar 9, 2026. Knowledge cutoff: MiMo-V2-Pro Dec 2024, Mistral Small 4 Jun 2025.
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.
