Sonar Reasoning Pro vs Palmyra X4
Too close to call on our weighted score (Sonar Reasoning Pro 27, Palmyra X4 25). The right pick depends on what you value most.
PerplexitySonar Reasoning Pro
27/100- ECI—
- Price$2.00 / $8.00
- Context128K
Writer
Palmyra X4
25/100- ECI—
- Price$2.50 / $10.00
- Context128K
Add a model
Make it a three-way comparison.
Too close to call
It is close. Our weighted score puts them within 2 points (Sonar Reasoning Pro 27/100, Palmyra X4 25/100), so choose by what matters most for your work: Sonar Reasoning Pro 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 priceSonar Reasoning ProSonar Reasoning Pro $3.50 · Palmyra X4 $4.38 per 1M tokens (3:1 blend)
- Longest contextAbout the sameSonar Reasoning Pro 128,000 · Palmyra X4 128,000 tokens
- Widest inputsSonar Reasoning ProSonar Reasoning Pro: Text, Images · Palmyra X4: Text
- Self-hostingNo open weightsBoth are available only through APIs
| Measure | Weight | Sonar Reasoning Pro | Palmyra X4 |
|---|---|---|---|
| Price | 50% | 24 | 19 |
| Inputs & features | 30% | 35 | 35 |
| Context window | 20% | 24 | 24 |
| Overall | 100% | 27/100 | 25/100 |
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 | Palmyra X4Writer |
|---|---|---|
| Capability | ||
| Capabilities Index (ECI) | — | — |
| ECI rank | — | — |
| Price per million tokens | ||
| Input | $2.00 (best) | $2.50 |
| Output | $8.00 (best) | $10.00 |
| Cached input | — | — |
| Blended (3:1) | $3.50 (best) | $4.38 |
| Long-context rate | Same rate | Same rate |
| Price source | Official Perplexity API | Median of 1 providers |
| Limits | ||
| Context window | 128,000 tokens | 128,000 tokens |
| Max output | 4,096 tokens | 4,096 tokens |
| Inputs and features | ||
| Text | Yes | Yes |
| Images | Yes | No |
| PDFs | No | No |
| Audio | No | No |
| Video | No | No |
| Reasoning | Yesminimal · low · medium · high | Yes |
| Tool calling | No | Yes |
| Structured output | No | No |
| Availability | ||
| Weights | Proprietary | Proprietary |
| API model ID | sonar-reasoning-pro | — |
| API providers | 4 (best) | 1 |
| Released | Jan 1, 2024 | Oct 9, 2024 |
| Knowledge cutoff | Sep 1, 2025 | — |
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
- Palmyra X4$45.00
Which should you choose?
Which is better: Sonar Reasoning Pro or Palmyra X4?
It is close. Our weighted score puts them within 2 points (Sonar Reasoning Pro 27/100, Palmyra X4 25/100), so choose by what matters most for your work: Sonar Reasoning Pro 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 or Palmyra X4?
Sonar Reasoning Pro is cheaper at $2.00 input / $8.00 output per million tokens (official Perplexity API price). Palmyra X4 costs $2.50 input / $10.00 output per million tokens (median across 1 API provider). At a typical mix of three input tokens to one output token, that is $3.50 per million tokens for Sonar Reasoning Pro versus $4.38 for Palmyra X4 (1.3× 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 Palmyra X4 has not been scored yet.
Which is better for coding?
There are no published SWE-bench Verified results for Sonar Reasoning Pro and Palmyra X4 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 and Palmyra X4 share the same 128,000-token context window. Maximum output per response: Sonar Reasoning Pro up to 4,096, Palmyra X4 up to 4,096 tokens.
Which can read images, PDFs, audio or video?
Sonar Reasoning Pro accepts text and images; Palmyra X4 accepts text. Sonar Reasoning Pro handles the widest range of inputs.
Are any of these open source?
No. Sonar Reasoning Pro and Palmyra X4 are proprietary and only available through APIs and apps.
Which is newer?
Palmyra X4 is the newest, released Oct 9, 2024. Sonar Reasoning Pro came out Jan 1, 2024. Knowledge cutoff: Sonar Reasoning Pro Sep 1, 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 Oct 4, 2026.
