Sonar Reasoning Pro vs Qwen2.5 72B Instruct
Too close to call on our weighted score (Qwen2.5 72B Instruct 28, Sonar Reasoning Pro 27). The right pick depends on what you value most.
PerplexitySonar Reasoning Pro
27/100- ECI—
- Price$2.00 / $8.00
- Context128K
Alibaba (Qwen)Qwen2.5 72B Instruct
28/100- ECI129.0
- Price$1.40 / $5.60
- Context131K
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Make it a three-way comparison.
Too close to call
It is close. Our weighted score puts them within a point (Qwen2.5 72B Instruct 28/100, Sonar Reasoning Pro 27/100), so choose by what matters most for your work: Qwen2.5 72B Instruct on price and Qwen2.5 72B Instruct 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 priceQwen2.5 72B InstructQwen2.5 72B Instruct $2.45 · Sonar Reasoning Pro $3.50 per 1M tokens (3:1 blend)
- Longest contextQwen2.5 72B InstructQwen2.5 72B Instruct 131,072 · Sonar Reasoning Pro 128,000 tokens
- Widest inputsSonar Reasoning ProSonar Reasoning Pro: Text, Images · Qwen2.5 72B Instruct: Text
- Self-hostingQwen2.5 72B InstructPublishes downloadable weights
| Measure | Weight | Sonar Reasoning Pro | Qwen2.5 72B Instruct |
|---|---|---|---|
| Price | 50% | 24 | 31 |
| Inputs & features | 30% | 35 | 25 |
| Context window | 20% | 24 | 24 |
| Overall | 100% | 27/100 | 28/100 |
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 | Qwen2.5 72B InstructAlibaba (Qwen) |
|---|---|---|
| Capability | ||
| Capabilities Index (ECI) | — | 129.0 |
| ECI rank | — | #128 of 148 |
| GPQA DiamondGraduate-level science questions | — | 49.2% |
| OTIS Mock AIME 2024–2025Competition mathematics | — | 8.1% |
| Price per million tokens | ||
| Input | $2.00 | $1.40 (best) |
| Output | $8.00 | $5.60 (best) |
| Cached input | — | — |
| Blended (3:1) | $3.50 | $2.45 (best) |
| Long-context rate | Same rate | Same rate |
| Price source | Official Perplexity API | Official Alibaba API |
| Limits | ||
| Context window | 128,000 tokens | 131,072 tokens (best) |
| Max output | 4,096 tokens | 8,192 tokens (best) |
| Inputs and features | ||
| Text | Yes | Yes |
| Images | Yes | No |
| PDFs | No | No |
| Audio | No | No |
| Video | No | No |
| Reasoning | Yesminimal · low · medium · high | No |
| Tool calling | No | Yes |
| Structured output | No | No |
| Availability | ||
| Weights | Proprietary | Open |
| API model ID | sonar-reasoning-pro | qwen2-5-72b-instruct |
| API providers | 4 (best) | 1 |
| Released | Jan 1, 2024 | Sep 19, 2024 |
| Knowledge cutoff | Sep 1, 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.
- Sonar Reasoning Pro$36.00
- Qwen2.5 72B Instruct$25.20
Which should you choose?
Which is better: Sonar Reasoning Pro or Qwen2.5 72B Instruct?
It is close. Our weighted score puts them within a point (Qwen2.5 72B Instruct 28/100, Sonar Reasoning Pro 27/100), so choose by what matters most for your work: Qwen2.5 72B Instruct on price and Qwen2.5 72B Instruct 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, Sonar Reasoning Pro or Qwen2.5 72B Instruct?
Qwen2.5 72B Instruct is cheaper at $1.40 input / $5.60 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). At a typical mix of three input tokens to one output token, that is $2.45 per million tokens for Qwen2.5 72B Instruct versus $3.50 for Sonar Reasoning Pro (1.4× as much).
Which scores higher on benchmarks?
There is no independent benchmark that covers both models yet. Sonar Reasoning Pro has not been scored yet and Qwen2.5 72B Instruct has an ECI of 129.0.
Which is better for coding?
There are no published SWE-bench Verified results for Sonar Reasoning Pro and Qwen2.5 72B Instruct 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?
Qwen2.5 72B Instruct has the largest context window at 131,072 tokens, against 128,000 for Sonar Reasoning Pro. Maximum output per response: Sonar Reasoning Pro up to 4,096, Qwen2.5 72B Instruct up to 8,192 tokens.
Which can read images, PDFs, audio or video?
Sonar Reasoning Pro accepts text and images; Qwen2.5 72B Instruct accepts text. Sonar Reasoning Pro handles the widest range of inputs.
Are any of these open source?
Qwen2.5 72B Instruct publishes its weights and can be self-hosted; Sonar Reasoning Pro is proprietary.
Which is newer?
Qwen2.5 72B Instruct is the newest, released Sep 19, 2024. Sonar Reasoning Pro came out Jan 1, 2024. Knowledge cutoff: Sonar Reasoning Pro Sep 1, 2025, Qwen2.5 72B Instruct 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.
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