Solar Pro 2 vs Grok 4.1 Fast vs Qwen-MT Turbo
Grok 4.1 Fast comes out ahead, 71 to 52 and 40 on our weighted score, though Qwen-MT Turbo is 12% cheaper per token.
Upstage
Solar Pro 2
52/100- ECI—
- Price$0.25 / $0.25
- Context66K
- Our pick
xAIGrok 4.1 Fast
71/100- ECI—
- Price$0.20 / $0.50
- Context2M
Alibaba (Qwen)Qwen-MT Turbo
40/100- ECI—
- Price$0.16 / $0.49
- Context16K
Grok 4.1 Fast is our pick
Grok 4.1 Fast is the better all-round choice, scoring 71/100 against Solar Pro 2 (52) and Qwen-MT Turbo (40). It leads on inputs & features and 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 priceQwen-MT TurboQwen-MT Turbo $0.242 · Solar Pro 2 $0.25 · Grok 4.1 Fast $0.275 per 1M tokens (3:1 blend)
- Longest contextGrok 4.1 FastGrok 4.1 Fast 2,000,000 · Solar Pro 2 65,536 · Qwen-MT Turbo 16,384 tokens
- Widest inputsGrok 4.1 FastSolar Pro 2: Text · Grok 4.1 Fast: Text, Images · Qwen-MT Turbo: Text
- Self-hostingNo open weightsAll three are available only through APIs
| Measure | Weight | Solar Pro 2 | Grok 4.1 Fast | Qwen-MT Turbo |
|---|---|---|---|---|
| Price | 50% | 78 | 76 | 79 |
| Inputs & features | 30% | 35 | 60 | 0 |
| Context window | 20% | 12 | 72 | 0 |
| Overall | 100% | 52/100 | 71/100 | 40/100 |
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 | Solar Pro 2Upstage | Grok 4.1 FastxAI | Qwen-MT TurboAlibaba (Qwen) |
|---|---|---|---|
| Capability | |||
| Capabilities Index (ECI) | — | — | — |
| ECI rank | — | — | — |
| Price per million tokens | |||
| Input | $0.25 | $0.20 | $0.16 (best) |
| Output | $0.25 (best) | $0.50 | $0.49 |
| Cached input | — | — | — |
| Blended (3:1) | $0.25 | $0.275 | $0.242 (best) |
| Long-context rate | Same rate | Same rate | Same rate |
| Price source | Official Upstage API | Median of 2 providers | Official Alibaba API |
| Limits | |||
| Context window | 65,536 tokens | 2,000,000 tokens (best) | 16,384 tokens |
| Max output | 8,192 tokens | 30,000 tokens (best) | 8,192 tokens |
| Inputs and features | |||
| Text | Yes | Yes | Yes |
| Images | No | Yes | No |
| PDFs | No | No | No |
| Audio | No | No | No |
| Video | No | No | No |
| Reasoning | Yesminimal · high | No | No |
| Tool calling | Yes | Yes | No |
| Structured output | No | Yes | No |
| Availability | |||
| Weights | Proprietary | Proprietary | Proprietary |
| API model ID | solar-pro2 | — | qwen-mt-turbo |
| API providers | 2 (best) | 2 (best) | 1 |
| Released | May 20, 2025 | Nov 19, 2025 | Jan 2025 |
| Knowledge cutoff | Mar 2025 | — | Apr 2024 |
What would a month cost?
Enter your expected volume in millions of tokens. List prices only; caching and batch discounts would lower these.
- Solar Pro 2$3.00
- Grok 4.1 Fast$3.00
- Qwen-MT Turbo$2.58
Which should you choose?
Which is better: Solar Pro 2, Grok 4.1 Fast or Qwen-MT Turbo?
Grok 4.1 Fast is the better all-round choice, scoring 71/100 against Solar Pro 2 (52) and Qwen-MT Turbo (40). It leads on inputs & features and 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, Solar Pro 2, Grok 4.1 Fast or Qwen-MT Turbo?
Qwen-MT Turbo is cheaper at $0.16 input / $0.49 output per million tokens (official Alibaba API price). Solar Pro 2 costs $0.25 input / $0.25 output per million tokens (official Upstage API price); Grok 4.1 Fast costs $0.20 input / $0.50 output per million tokens (median across 2 API providers). At a typical mix of three input tokens to one output token, that is $0.242 per million tokens for Qwen-MT Turbo versus $0.25 for Solar Pro 2 (1× as much) and $0.275 for Grok 4.1 Fast (1.1× as much).
Which scores higher on benchmarks?
There is no independent benchmark that covers all three models yet. Solar Pro 2 has not been scored yet, Grok 4.1 Fast has not been scored yet and Qwen-MT Turbo has not been scored yet.
Which is better for coding?
There are no published SWE-bench Verified results for Solar Pro 2, Grok 4.1 Fast and Qwen-MT Turbo yet, so there is no like-for-like coding score. Test both on a sample of your own tasks. Note that Qwen-MT Turbo does not support tool calling, which most coding agents need.
Which has the bigger context window?
Grok 4.1 Fast has the largest context window at 2,000,000 tokens, against 65,536 for Solar Pro 2 and 16,384 for Qwen-MT Turbo. Maximum output per response: Solar Pro 2 up to 8,192, Grok 4.1 Fast up to 30,000, Qwen-MT Turbo up to 8,192 tokens.
Which can read images, PDFs, audio or video?
Solar Pro 2 accepts text; Grok 4.1 Fast accepts text and images; Qwen-MT Turbo accepts text. Grok 4.1 Fast handles the widest range of inputs.
Are any of these open source?
No. Solar Pro 2, Grok 4.1 Fast and Qwen-MT Turbo are proprietary and only available through APIs and apps.
Which is newer?
Grok 4.1 Fast is the newest, released Nov 19, 2025. Solar Pro 2 came out May 20, 2025; Qwen-MT Turbo came out Jan 2025. Knowledge cutoff: Solar Pro 2 Mar 2025, Qwen-MT Turbo Apr 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.
