Step 5 Preview vs Palmyra X5
Updated October 21, 2026. 0 benchmarks have a result for both. Coding is ranked on the Vibe Coding Index; every other board is shown as published.
- Coding
- 61.1
- Overall
- 43.7
- Output $/M
- $2.70
- Coding
- No data
- Overall
- No data
- Output $/M
- $6.00
Decision reading
Only Step 5 Preview has a coding score, 61.1 on the Vibe Coding Index; Palmyra X5 has none, so the two cannot be ranked on coding.
Compare them on price, context and the boards below.
- Shared results
- 0
- Step 5 Preview only
- 61
- Palmyra X5 only
- 0
- Like-for-like categories
- 0 of 9
Shared results can support a head-to-head reading. Results only one model has describe coverage, not superiority.
Which one for your work
Each card is decided by one number both models carry. Where only one has it, the card says so and makes no call.
Coding
Vibe Coding Index, six public coding benchmarks
No call
Only Step 5 Preview has a coding score, so no call is made.
One side not measured
Intelligence
AA Intelligence Index
No call
Only Step 5 Preview has a AA Intelligence Index result, 43.7.
Directional only
Long documents
Listed context window
Step 5 Preview
Step 5 Preview takes 1.05M tokens against 1.04M.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
Step 5 Preview
Step 5 Preview $0.0024, Palmyra X5 $0.0036 per turn.
List prices
At a glance
- Coding index
- Step 5 Preview 61.1 from 4 benchmarks, Palmyra X5 not benchmarked.
- Widest category
- No category has a result for both models.
- Widest single gap
- No benchmark has a result for both models.
- Output price
- Step 5 Preview $2.70 against Palmyra X5 $6.00 per million output tokens, 2.2x apart.
- Context window
- Step 5 Preview takes 1.05M tokens, Palmyra X5 1.04M.
Benchmark by benchmark
First the score: boards each model leads, per category, where both have a result. Then every board, a category to a fold; bars are each result on a 0 to 100 scale, so compare the two in a row, not one row with another.
CodingDirectional onlySix of these boards feed the Vibe Coding Index13 boards, none shared
| Benchmark | Step 5 Preview | Palmyra X5 | Leader |
|---|---|---|---|
| LiveBench coding | 85.6% | Not measured | Only Step 5 Preview measured |
| LMArena WebDev | 1567 | Not measured | Only Step 5 Preview measured |
| Terminal-Bench 4 (Vals AI) | 31.8% | Not measured | Only Step 5 Preview measured |
| Vibe Code Bench (Vals AI) | 70.4% | Not measured | Only Step 5 Preview measured |
| Code migration (Vals AI) | 39.0% | Not measured | Only Step 5 Preview measured |
| IOI (Vals AI) | 38.1% | Not measured | Only Step 5 Preview measured |
| SWE-bench Multimodal (Vals AI) | 40.8% | Not measured | Only Step 5 Preview measured |
| SciCode | 58.9% | Not measured | Only Step 5 Preview measured |
| LMArena Text: coding | 1485 | Not measured | Only Step 5 Preview measured |
| LMArena Text: software and IT | 1473 | Not measured | Only Step 5 Preview measured |
| LMArena WebDev: React | 1583 | Not measured | Only Step 5 Preview measured |
| LMArena WebDev: HTML | 1556 | Not measured | Only Step 5 Preview measured |
| LMArena WebDev: from an image | 1550 | Not measured | Only Step 5 Preview measured |
| Neither model has a result on the other 25 boards here | |||
IntelligenceDirectional onlyPublic boards, shown as published, kept out of the index1 board, none shared
| Benchmark | Step 5 Preview | Palmyra X5 | Leader |
|---|---|---|---|
| AA Intelligence Index | 43.7 | Not measured | Only Step 5 Preview measured |
| Neither model has a result on the other 1 board here | |||
Agentic workDirectional onlyPublic boards, shown as published, kept out of the index11 boards, none shared
| Benchmark | Step 5 Preview | Palmyra X5 | Leader |
|---|---|---|---|
| LiveBench research | 72.8% | Not measured | Only Step 5 Preview measured |
| LiveBench browser | 24.0% | Not measured | Only Step 5 Preview measured |
| LiveBench long agentic | 27.5% | Not measured | Only Step 5 Preview measured |
| SREBench (Vals AI) | 0.4% | Not measured | Only Step 5 Preview measured |
| Finance Agent (Vals AI) | 50.7% | Not measured | Only Step 5 Preview measured |
| Tax Agent Bench (Vals AI) | 27.3% | Not measured | Only Step 5 Preview measured |
| Legal Research Bench (Vals AI) | 40.4% | Not measured | Only Step 5 Preview measured |
| Excel Modeling Benchmark (Vals AI) | 57.1% | Not measured | Only Step 5 Preview measured |
| BioMysteryBench (Vals AI) | 67.4% | Not measured | Only Step 5 Preview measured |
| Terminal-Bench-Science (Vals AI) | 2.9% | Not measured | Only Step 5 Preview measured |
| Vals Science Index | 29.6% | Not measured | Only Step 5 Preview measured |
| Neither model has a result on the other 28 boards here | |||
ReasoningDirectional onlyPublic boards, shown as published, kept out of the index8 boards, none shared
| Benchmark | Step 5 Preview | Palmyra X5 | Leader |
|---|---|---|---|
| LiveBench reasoning | 83.8% | Not measured | Only Step 5 Preview measured |
| MysteryMechanism (Vals AI) | 18.5% | Not measured | Only Step 5 Preview measured |
| Humanity's Last Exam (Artificial Analysis run) | 46.5% | Not measured | Only Step 5 Preview measured |
| LMArena Text: hard prompts | 1461 | Not measured | Only Step 5 Preview measured |
| LMArena Text: expert | 1485 | Not measured | Only Step 5 Preview measured |
| LMArena Text: hard prompts in English | 1454 | Not measured | Only Step 5 Preview measured |
| LMArena Vision: diagrams | 1308 | Not measured | Only Step 5 Preview measured |
| LMArena Vision: homework | 1265 | Not measured | Only Step 5 Preview measured |
| Neither model has a result on the other 13 boards here | |||
MathDirectional onlyPublic boards, shown as published, kept out of the index3 boards, none shared
| Benchmark | Step 5 Preview | Palmyra X5 | Leader |
|---|---|---|---|
| ProofBench | 42.0% | Not measured | Only Step 5 Preview measured |
| LMArena Text: math | 1458 | Not measured | Only Step 5 Preview measured |
| LMArena Text: mathematical work | 1460 | Not measured | Only Step 5 Preview measured |
| Neither model has a result on the other 10 boards here | |||
KnowledgeDirectional onlyPublic boards, shown as published, kept out of the index4 boards, none shared
| Benchmark | Step 5 Preview | Palmyra X5 | Leader |
|---|---|---|---|
| LMArena Text: science | 1454 | Not measured | Only Step 5 Preview measured |
| LMArena Text: medicine and healthcare | 1439 | Not measured | Only Step 5 Preview measured |
| LMArena Text: legal and government | 1437 | Not measured | Only Step 5 Preview measured |
| LMArena Text: business and finance | 1435 | Not measured | Only Step 5 Preview measured |
| Neither model has a result on the other 13 boards here | |||
Web designDirectional onlyPublic boards, shown as published, kept out of the index1 board, none shared
| Benchmark | Step 5 Preview | Palmyra X5 | Leader |
|---|---|---|---|
| LiveBench design | 76.9% | Not measured | Only Step 5 Preview measured |
| Neither model has a result on the other 8 boards here | |||
GeneralDirectional onlyPublic boards, shown as published, kept out of the index20 boards, none shared
| Benchmark | Step 5 Preview | Palmyra X5 | Leader |
|---|---|---|---|
| LiveBench data analysis | 63.5% | Not measured | Only Step 5 Preview measured |
| Public Benefits Bench (Vals AI) | 58.1% | Not measured | Only Step 5 Preview measured |
| Long context reasoning (AA-LCR) | 88.3% | Not measured | Only Step 5 Preview measured |
| LMArena Text | 1440 | Not measured | Only Step 5 Preview measured |
| LMArena Text: instruction following | 1438 | Not measured | Only Step 5 Preview measured |
| LMArena Text: creative writing | 1409 | Not measured | Only Step 5 Preview measured |
| LMArena Vision | 1265 | Not measured | Only Step 5 Preview measured |
| LMArena Text: English | 1447 | Not measured | Only Step 5 Preview measured |
| LMArena Text: non-English | 1428 | Not measured | Only Step 5 Preview measured |
| LMArena Text: Chinese | 1500 | Not measured | Only Step 5 Preview measured |
| LMArena Text: Japanese | 1383 | Not measured | Only Step 5 Preview measured |
| LMArena Text: French | 1438 | Not measured | Only Step 5 Preview measured |
| LMArena Text: Spanish | 1441 | Not measured | Only Step 5 Preview measured |
| LMArena Text: Russian | 1433 | Not measured | Only Step 5 Preview measured |
| LMArena Text: multi-turn | 1437 | Not measured | Only Step 5 Preview measured |
| LMArena Text: longer queries | 1449 | Not measured | Only Step 5 Preview measured |
| LMArena Text: writing and language | 1425 | Not measured | Only Step 5 Preview measured |
| LMArena Text: entertainment and media | 1412 | Not measured | Only Step 5 Preview measured |
| LMArena Vision: English | 1290 | Not measured | Only Step 5 Preview measured |
| LMArena Vision: reading text | 1282 | Not measured | Only Step 5 Preview measured |
| Neither model has a result on the other 26 boards here | |||
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
| Benchmark | Step 5 Preview | Palmyra X5 | Leader |
|---|---|---|---|
| Neither model has a result on 5 boards here | |||
What each workload costs
Three fixed token mixes at each model's listed price, so per-token rates become a bill.
Chat turn
1K input + 500 output tokens
Step 5 Preview costs less
Repository review
50K input + 3K output tokens
Palmyra X5 costs less
Agent loop
200K input + 10K output tokens
Palmyra X5 costs less
Listed OpenRouter rates, without cache or batch discounts. A workload that does not fit a model's context window would need splitting.
Specification differences
The leading value in a row is marked; a row with a missing value names no leader. Our two rows are marked in red.
| Specification | StepFun Step 5 Preview | Writer Palmyra X5 |
|---|---|---|
| Maker | StepFun | Writer |
| Weights | Open weights | No public weights listed |
| Released | October 8, 2026 | January 21, 2026 |
| Context window | 1.05M | 1.04M |
| Input $/Mtok | $1.00 | $0.60 |
| Output $/Mtok | $2.70 | $6.00 |
| Coding index | 61.1 | Not benchmarked |
| Independent measurements behind it | 4 | 0 |
| Cost per solved task | Not computable | Not computable |
| Source | OpenRouter listing | OpenRouter listing |
Questions
Is Step 5 Preview better than Palmyra X5 for coding?
Only Step 5 Preview has a coding score, 61.1 on the Vibe Coding Index; Palmyra X5 has none, so the two cannot be ranked on coding. Compare them on price, context and the boards below.
Which is cheaper, Step 5 Preview or Palmyra X5?
Step 5 Preview costs $1.00 per million input tokens and $2.70 per million output tokens; Palmyra X5 costs $0.60 and $6.00. Cost per solved task is known for neither of them.
Which has the bigger context window, Step 5 Preview or Palmyra X5?
Step 5 Preview, with 1.05M tokens against 1.04M.
How many benchmarks is the Step 5 Preview vs Palmyra X5 comparison based on?
0 benchmarks have a result for both models as of October 21, 2026. Step 5 Preview's coding index rests on 4 independent benchmarks and Palmyra X5's on 0. Where only one model has a result, the page says so instead of naming a winner.