Palmyra X4 vs Jamba Large
Jamba Large comes out ahead, 29 to 25 on our weighted score, and it is the cheaper option too.
Writer
Palmyra X4
25/100- ECI—
- Price$2.50 / $10.00
- Context128K
- Our pick
AI21 LabsJamba Large
29/100- ECI—
- Price$2.00 / $8.00
- Context256K
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Make it a three-way comparison.
Jamba Large is our pick
Jamba Large is the better all-round choice, scoring 29/100 against Palmyra X4 (25). It leads on price 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 priceJamba LargeJamba Large $3.50 · Palmyra X4 $4.38 per 1M tokens (3:1 blend)
- Longest contextJamba LargeJamba Large 256,000 · Palmyra X4 128,000 tokens
- Widest inputsSame inputsPalmyra X4: Text · Jamba Large: Text
- Self-hostingJamba LargePublishes downloadable weights
| Measure | Weight | Palmyra X4 | Jamba Large |
|---|---|---|---|
| Price | 50% | 19 | 23 |
| Inputs & features | 30% | 35 | 35 |
| Context window | 20% | 24 | 36 |
| Overall | 100% | 25/100 | 29/100 |
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 | Jamba LargeAI21 Labs |
|---|---|---|
| Capability | ||
| Capabilities Index (ECI) | — | — |
| ECI rank | — | — |
| Price per million tokens | ||
| Input | $2.50 | $2.00 (best) |
| Output | $10.00 | $8.00 (best) |
| Cached input | — | — |
| Blended (3:1) | $4.38 | $3.50 (best) |
| Long-context rate | Same rate | Same rate |
| Price source | Median of 2 providers | Official AI21 Labs API |
| Limits | ||
| Context window | 128,000 tokens | 256,000 tokens (best) |
| Max output | 4,096 tokens | 4,096 tokens |
| Inputs and features | ||
| Text | Yes | Yes |
| Images | No | No |
| PDFs | No | No |
| Audio | No | No |
| Video | No | No |
| Reasoning | Yes | No |
| Tool calling | Yes | Yes |
| Structured output | No | Yes |
| Availability | ||
| Weights | Proprietary | Open |
| API model ID | — | jamba-large |
| API providers | 2 (best) | 1 |
| Released | Oct 9, 2024 | Jul 3, 2025 |
| Knowledge cutoff | — | Aug 22, 2024 |
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
- Jamba Large$36.00
Which should you choose?
Which is better: Palmyra X4 or Jamba Large?
Jamba Large is the better all-round choice, scoring 29/100 against Palmyra X4 (25). It leads on price 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, Palmyra X4 or Jamba Large?
Jamba Large is cheaper at $2.00 input / $8.00 output per million tokens (official AI21 Labs API price). Palmyra X4 costs $2.50 input / $10.00 output per million tokens (median across 2 API providers). At a typical mix of three input tokens to one output token, that is $3.50 per million tokens for Jamba Large 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. Palmyra X4 has not been scored yet and Jamba Large has not been scored yet.
Which is better for coding?
There are no published SWE-bench Verified results for Palmyra X4 and Jamba Large yet, so there is no like-for-like coding score. Test both on a sample of your own tasks. Both support tool calling for agent workflows.
Which has the bigger context window?
Jamba Large has the largest context window at 256,000 tokens, against 128,000 for Palmyra X4. Maximum output per response: Palmyra X4 up to 4,096, Jamba Large up to 4,096 tokens.
Which can read images, PDFs, audio or video?
Palmyra X4 accepts text; Jamba Large accepts text. They handle the same number of input types.
Are any of these open source?
Jamba Large publishes its weights and can be self-hosted; Palmyra X4 is proprietary.
Which is newer?
Jamba Large is the newest, released Jul 3, 2025. Palmyra X4 came out Oct 9, 2024. Knowledge cutoff: Jamba Large Aug 22, 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 Nov 2, 2026.
