Sonar Reasoning Pro vs Step 2 (16K) vs Qwen Max
Sonar Reasoning Pro comes out ahead, 27 to 22 and 11 on our weighted score, though Qwen Max is 20% cheaper per token.
- Our pick
PerplexitySonar Reasoning Pro
27/100- ECI—
- Price$2.00 / $8.00
- Context128K
StepFunStep 2 (16K)
11/100- ECI—
- Price$5.21 / $16.44
- Context16K
Alibaba (Qwen)Qwen Max
22/100- ECI—
- Price$1.60 / $6.40
- Context33K
Sonar Reasoning Pro is our pick
Sonar Reasoning Pro is the better all-round choice, scoring 27/100 against Qwen Max (22) and Step 2 (16K) (11). It leads on inputs & features and context window. Qwen Max 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 priceQwen MaxQwen Max $2.80 · Sonar Reasoning Pro $3.50 · Step 2 (16K) $8.02 per 1M tokens (3:1 blend)
- Longest contextSonar Reasoning ProSonar Reasoning Pro 128,000 · Qwen Max 32,768 · Step 2 (16K) 16,384 tokens
- Widest inputsSonar Reasoning ProSonar Reasoning Pro: Text, Images · Step 2 (16K): Text · Qwen Max: Text
- Self-hostingNo open weightsAll three are available only through APIs
| Measure | Weight | Sonar Reasoning Pro | Step 2 (16K) | Qwen Max |
|---|---|---|---|---|
| Price | 50% | 24 | 7 | 29 |
| Inputs & features | 30% | 35 | 25 | 25 |
| Context window | 20% | 24 | 0 | 0 |
| Overall | 100% | 27/100 | 11/100 | 22/100 |
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 | Sonar Reasoning ProPerplexity | Step 2 (16K)StepFun | Qwen MaxAlibaba (Qwen) |
|---|---|---|---|
| Capability | |||
| Capabilities Index (ECI) | — | — | — |
| ECI rank | — | — | — |
| Price per million tokens | |||
| Input | $2.00 | $5.21 | $1.60 (best) |
| Output | $8.00 | $16.44 | $6.40 (best) |
| Cached input | — | $1.04 | — |
| Blended (3:1) | $3.50 | $8.02 | $2.80 (best) |
| Long-context rate | Same rate | Same rate | Same rate |
| Price source | Official Perplexity API | Official StepFun (Global) API | Official Alibaba API |
| Limits | |||
| Context window | 128,000 tokens (best) | 16,384 tokens | 32,768 tokens |
| Max output | 4,096 tokens | 8,192 tokens (best) | 8,192 tokens (best) |
| Inputs and features | |||
| Text | Yes | Yes | Yes |
| Images | Yes | No | No |
| PDFs | No | No | No |
| Audio | No | No | No |
| Video | No | No | No |
| Reasoning | Yesminimal · low · medium · high | No | No |
| Tool calling | No | Yes | Yes |
| Structured output | No | No | No |
| Availability | |||
| Weights | Proprietary | Proprietary | Proprietary |
| API model ID | sonar-reasoning-pro | step-2-16k | qwen-max |
| API providers | 4 | 1 | 6 (best) |
| Released | Jan 1, 2024 | Jan 1, 2025 | Apr 3, 2024 |
| Knowledge cutoff | Sep 1, 2025 | Jun 2024 | 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.
- Sonar Reasoning Pro$36.00
- Step 2 (16K)$84.98
- Qwen Max$28.80
Which should you choose?
Which is better: Sonar Reasoning Pro, Step 2 (16K) or Qwen Max?
Sonar Reasoning Pro is the better all-round choice, scoring 27/100 against Qwen Max (22) and Step 2 (16K) (11). It leads on inputs & features and context window. Qwen Max 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, Sonar Reasoning Pro, Step 2 (16K) or Qwen Max?
Qwen Max is cheaper at $1.60 input / $6.40 output per million tokens (official Alibaba API price). Sonar Reasoning Pro costs $2.00 input / $8.00 output per million tokens (official Perplexity API price); Step 2 (16K) costs $5.21 input / $16.44 output per million tokens (official StepFun (Global) API price). At a typical mix of three input tokens to one output token, that is $2.80 per million tokens for Qwen Max versus $3.50 for Sonar Reasoning Pro (1.3× as much) and $8.02 for Step 2 (16K) (2.9× as much).
Which scores higher on benchmarks?
There is no independent benchmark that covers all three models yet. Sonar Reasoning Pro has not been scored yet, Step 2 (16K) has not been scored yet and Qwen Max has not been scored yet.
Which is better for coding?
There are no published SWE-bench Verified results for Sonar Reasoning Pro, Step 2 (16K) and Qwen Max yet, so there is no like-for-like coding score. Test both on a sample of your own tasks. Note that Sonar Reasoning Pro does not support tool calling, which most coding agents need.
Which has the bigger context window?
Sonar Reasoning Pro has the largest context window at 128,000 tokens, against 32,768 for Qwen Max and 16,384 for Step 2 (16K). Maximum output per response: Sonar Reasoning Pro up to 4,096, Step 2 (16K) up to 8,192, Qwen Max up to 8,192 tokens.
Which can read images, PDFs, audio or video?
Sonar Reasoning Pro accepts text and images; Step 2 (16K) accepts text; Qwen Max accepts text. Sonar Reasoning Pro handles the widest range of inputs.
Are any of these open source?
No. Sonar Reasoning Pro, Step 2 (16K) and Qwen Max are proprietary and only available through APIs and apps.
Which is newer?
Step 2 (16K) is the newest, released Jan 1, 2025. Qwen Max came out Apr 3, 2024; Sonar Reasoning Pro came out Jan 1, 2024. Knowledge cutoff: Sonar Reasoning Pro Sep 1, 2025, Step 2 (16K) Jun 2024, Qwen Max 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.
