Palmyra X4 vs Sonar Pro
Palmyra X4 comes out ahead, 25 to 20 on our weighted score, and it is the cheaper option too.
- Our pick
Writer
Palmyra X4
25/100- ECI—
- Price$2.50 / $10.00
- Context128K
PerplexitySonar Pro
20/100- ECI—
- Price$3.00 / $15.00
- Context200K
Add a model
Make it a three-way comparison.
Palmyra X4 is our pick
Palmyra X4 is the better all-round choice, scoring 25/100 against Sonar Pro (20). It leads on price and inputs & features. Sonar Pro wins on 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 pricePalmyra X4Palmyra X4 $4.38 · Sonar Pro $6.00 per 1M tokens (3:1 blend)
- Longest contextSonar ProSonar Pro 200,000 · Palmyra X4 128,000 tokens
- Widest inputsSonar ProPalmyra X4: Text · Sonar Pro: Text, Images
- Self-hostingNo open weightsBoth are available only through APIs
| Measure | Weight | Palmyra X4 | Sonar Pro |
|---|---|---|---|
| Price | 50% | 19 | 13 |
| Inputs & features | 30% | 35 | 25 |
| Context window | 20% | 24 | 32 |
| Overall | 100% | 25/100 | 20/100 |
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 | Palmyra X4Writer | Sonar ProPerplexity |
|---|---|---|
| Capability | ||
| Capabilities Index (ECI) | — | — |
| ECI rank | — | — |
| Price per million tokens | ||
| Input | $2.50 (best) | $3.00 |
| Output | $10.00 (best) | $15.00 |
| Cached input | — | — |
| Blended (3:1) | $4.38 (best) | $6.00 |
| Long-context rate | Same rate | Same rate |
| Price source | Median of 1 providers | Official Perplexity API |
| Limits | ||
| Context window | 128,000 tokens | 200,000 tokens (best) |
| Max output | 4,096 tokens | 8,192 tokens (best) |
| Inputs and features | ||
| Text | Yes | Yes |
| Images | No | Yes |
| PDFs | No | No |
| Audio | No | No |
| Video | No | No |
| Reasoning | Yes | No |
| Tool calling | Yes | No |
| Structured output | No | No |
| Availability | ||
| Weights | Proprietary | Proprietary |
| API model ID | — | sonar-pro |
| API providers | 1 | 5 (best) |
| Released | Oct 9, 2024 | Jan 1, 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.
- Palmyra X4$45.00
- Sonar Pro$60.00
Which should you choose?
Which is better: Palmyra X4 or Sonar Pro?
Palmyra X4 is the better all-round choice, scoring 25/100 against Sonar Pro (20). It leads on price and inputs & features. Sonar Pro wins on 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, Palmyra X4 or Sonar Pro?
Palmyra X4 is cheaper at $2.50 input / $10.00 output per million tokens (median across 1 API provider). Sonar Pro costs $3.00 input / $15.00 output per million tokens (official Perplexity API price). At a typical mix of three input tokens to one output token, that is $4.38 per million tokens for Palmyra X4 versus $6.00 for Sonar Pro (1.4× as much).
Which scores higher on benchmarks?
There is no independent benchmark that covers both models yet. Palmyra X4 has not been scored yet and Sonar Pro has not been scored yet.
Which is better for coding?
There are no published SWE-bench Verified results for Palmyra X4 and Sonar Pro yet, so there is no like-for-like coding score. Test both on a sample of your own tasks. Note that Sonar Pro does not support tool calling, which most coding agents need.
Which has the bigger context window?
Sonar Pro has the largest context window at 200,000 tokens, against 128,000 for Palmyra X4. Maximum output per response: Palmyra X4 up to 4,096, Sonar Pro up to 8,192 tokens.
Which can read images, PDFs, audio or video?
Palmyra X4 accepts text; Sonar Pro accepts text and images. Sonar Pro handles the widest range of inputs.
Are any of these open source?
No. Palmyra X4 and Sonar Pro are proprietary and only available through APIs and apps.
Which is newer?
Palmyra X4 is the newest, released Oct 9, 2024. Sonar Pro came out Jan 1, 2024. Knowledge cutoff: Sonar 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.
