Grok 4.20 (Non-Reasoning) vs Kimi K2 Instruct 0905 vs MiMo-V2-Pro
Grok 4.20 (Non-Reasoning) comes out ahead, 52 to 42 and 38 on our weighted score, though Kimi K2 Instruct 0905 is 31% cheaper per token.
- Our pick
xAIGrok 4.20 (Non-Reasoning)
52/100- ECI—
- Price$1.25 / $2.50
- Context1M
Moonshot AIKimi K2 Instruct 0905
38/100- ECI—
- Price$0.60 / $2.50
- Context262K
XiaomiMiMo-V2-Pro
42/100- ECI—
- Price$1.00 / $3.00
- Context1.05M
Grok 4.20 (Non-Reasoning) is our pick
Grok 4.20 (Non-Reasoning) is the better all-round choice, scoring 52/100 against MiMo-V2-Pro (42) and Kimi K2 Instruct 0905 (38). It leads on inputs & features. Kimi K2 Instruct 0905 wins 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 priceKimi K2 Instruct 0905Kimi K2 Instruct 0905 $1.07 · 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 · Kimi K2 Instruct 0905 262,144 tokens
- Widest inputsGrok 4.20 (Non-Reasoning)Grok 4.20 (Non-Reasoning): Text, Images, PDFs · Kimi K2 Instruct 0905: Text · MiMo-V2-Pro: Text
- Self-hostingKimi K2 Instruct 0905Publishes downloadable weights (Modified MIT)
| Measure | Weight | Grok 4.20 (Non-Reasoning) | Kimi K2 Instruct 0905 | MiMo-V2-Pro |
|---|---|---|---|---|
| Price | 50% | 39 | 46 | 40 |
| Inputs & features | 30% | 70 | 25 | 35 |
| Context window | 20% | 60 | 37 | 61 |
| Overall | 100% | 52/100 | 38/100 | 42/100 |
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 | Grok 4.20 (Non-Reasoning)xAI | Kimi K2 Instruct 0905Moonshot AI | MiMo-V2-ProXiaomi |
|---|---|---|---|
| Capability | |||
| Capabilities Index (ECI) | — | — | — |
| ECI rank | — | — | — |
| Price per million tokens | |||
| Input | $1.25 | $0.60 (best) | $1.00 |
| Output | $2.50 (best) | $2.50 (best) | $3.00 |
| Cached input | $0.20 | — | — |
| Blended (3:1) | $1.56 | $1.07 (best) | $1.50 |
| Long-context rate | Over 200K: $2.50 / $5.00 | Same rate | Same rate |
| Price source | Official xAI API | Median of 12 providers | Median of 1 providers |
| Limits | |||
| Context window | 1,000,000 tokens | 262,144 tokens | 1,048,576 tokens (best) |
| Max output | 30,000 tokens | 98,304 tokens | 131,072 tokens (best) |
| Inputs and features | |||
| Text | Yes | Yes | Yes |
| Images | Yes | No | No |
| PDFs | Yes | No | No |
| Audio | No | No | No |
| Video | No | No | No |
| Reasoning | No | No | Yes |
| Tool calling | Yes | Yes | Yes |
| Structured output | Yes | No | No |
| Availability | |||
| Weights | Proprietary | OpenModified MIT | Proprietary |
| API model ID | grok-4.20-0309-non-reasoning | — | — |
| API providers | 13 (best) | 13 (best) | 2 |
| Released | Mar 9, 2026 | Sep 5, 2025 | Mar 18, 2026 |
| Knowledge cutoff | — | — | 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.
- Grok 4.20 (Non-Reasoning)$17.50
- Kimi K2 Instruct 0905$11.00
- MiMo-V2-Pro$16.00
Which should you choose?
Which is better: Grok 4.20 (Non-Reasoning), Kimi K2 Instruct 0905 or MiMo-V2-Pro?
Grok 4.20 (Non-Reasoning) is the better all-round choice, scoring 52/100 against MiMo-V2-Pro (42) and Kimi K2 Instruct 0905 (38). It leads on inputs & features. Kimi K2 Instruct 0905 wins 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, Grok 4.20 (Non-Reasoning), Kimi K2 Instruct 0905 or MiMo-V2-Pro?
Kimi K2 Instruct 0905 is cheaper at $0.60 input / $2.50 output per million tokens (median across 12 API providers). 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 $1.07 per million tokens for Kimi K2 Instruct 0905 versus $1.50 for MiMo-V2-Pro (1.4× as much) and $1.56 for Grok 4.20 (Non-Reasoning) (1.5× as much).
Which scores higher on benchmarks?
There is no independent benchmark that covers all three models yet. Grok 4.20 (Non-Reasoning) has not been scored yet, Kimi K2 Instruct 0905 has not been scored yet and MiMo-V2-Pro has not been scored yet.
Which is better for coding?
There are no published SWE-bench Verified results for Grok 4.20 (Non-Reasoning), Kimi K2 Instruct 0905 and MiMo-V2-Pro 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 262,144 for Kimi K2 Instruct 0905. Maximum output per response: Grok 4.20 (Non-Reasoning) up to 30,000, Kimi K2 Instruct 0905 up to 98,304, MiMo-V2-Pro up to 131,072 tokens.
Which can read images, PDFs, audio or video?
Grok 4.20 (Non-Reasoning) accepts text, images and PDFs; Kimi K2 Instruct 0905 accepts text; MiMo-V2-Pro accepts text. Grok 4.20 (Non-Reasoning) handles the widest range of inputs.
Are any of these open source?
Kimi K2 Instruct 0905 publishes its weights (Modified MIT) and can be self-hosted; Grok 4.20 (Non-Reasoning) and MiMo-V2-Pro is proprietary.
Which is newer?
MiMo-V2-Pro is the newest, released Mar 18, 2026. Grok 4.20 (Non-Reasoning) came out Mar 9, 2026; Kimi K2 Instruct 0905 came out Sep 5, 2025. Knowledge cutoff: MiMo-V2-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 Nov 2, 2026.
