Kimi K3.1 Pro test report
As of Oct 29, 2026, Kimi K3.1 Pro has a preliminary Spicy Index of 80.4. Freedom evidence is untested or insufficient. The Index retains the original quality and capability score, is marked preliminary and still receives a rank. Missing evidence is not zero.
Every point behind the Kimi K3.1 Pro scores: the table row each item landed on, where it lost points, and every content test with its date.
- Methodology v3.3 →
- Scores computed Oct 29, 2026
- Read the review →
- Language models leaderboard →
How the Spicy Index adds up
How this is scoredSpicy Index combines 70% quality and capability with 30% publishable Freedom Score. With full evidence, the weights are 59.5% quality, 10.5% capability and 30% freedom. Price and speed stay separate.
Board leader comparison
2.1 Index points behind Claude Opus 5.5. Models tied for first: 1.
| Dimension | Kimi K3.1 Pro | Claude Opus 5.5 | Weighted gap |
|---|---|---|---|
| Public leaderboards | — | — | 0.0 |
| Role-play | — | 76.3 | +15.1 |
| Creative writing | 72.0 | 71.0 | -16.5 |
| Instruction following | 100.0 | 100.0 | -22.7 |
| Long-context memory | — | — | 0.0 |
| Capability | 49.0 | 65.0 | -0.5 |
| Freedom Score | — | 88.9 | +26.7 |
Freedom evidence is untested or insufficient. The Index retains the original quality and capability score, is marked preliminary and still receives a rank. Missing evidence is not zero.
| Dimension | Share of this Index | Status | Score |
|---|---|---|---|
| Public leaderboards | — | Pending | — |
| Role-play | — | Pending | — |
| Creative writing | 42.5% | Scored | 72.0 |
| Instruction following | 42.5% | Scored | 100.0 |
| Long-context memory | — | Pending | — |
| Capability | 15% | Scored | 49.0 |
| Freedom Score | — | Not yet tested | — |
Kimi K3.1 Pro: Capability, row by row
How this is scoredEach item is read from the model’s specification on SpicyAPI and matched to one row of a fixed table. No judgment calls.
49.0/ 1000 + 12 + 15 + 15 + 7 = 49 / 100
From the public model specification on SpicyAPI, Oct 29, 2026
| Item | On SpicyAPI | Row matched | Points | Points lost |
|---|---|---|---|---|
| Context window (creator-published)up to 30 pts | Not declared | Not statedShow the full table
| 0.0 / 30 | −30.0context window not stated |
| Input modalities on SpicyAPIup to 25 pts | Text, plus images | Image inputShow the full table
| 12.0 / 25 | −13.0not accepted on SpicyAPI: audio, file / PDF |
| Tool useup to 15 pts | Tools and tool_choice | Tools accepted + tool_choice controlShow the full table
| 15.0 / 15 | Full points |
| Structured outputup to 15 pts | Accepted, schema adherence verified | response_format accepted + JSON-schema adherence verifiedShow the full table
| 15.0 / 15 | Full points |
| Reasoning controlup to 15 pts | 3 levels: low · high · max | 3 levelsShow the full table
| 7.0 / 15 | −8.0fewer than 4 selectable levels; no off setting |
Share of points earned per item
Not tested yet
These dimensions have no data yet, so they aren’t in the Index. None of them is estimated.
Public leaderboards40% of quality
Not yet tested
Ratings from arena.ai, Artificial Analysis and Design Arena, exact model matches only, each converted to 0–100 and averaged by weight.
How this is scoredRole-play15% of quality
Not yet tested
Character consistency, immersion and no out-of-character lecturing: 30 scenarios × 3 samples, scored by three blind LLM judges.
How this is scoredLong-context memory15% of quality
Not yet tested
Recall and two-hop questions at 32k, 128k, 256k, 512k and 1M tokens, within the model’s published window.
How this is scored
Kimi K3.1 Pro content tests, task by task
How this is scoredThe family score is the average of its task scores, so a single cautious task pulls the whole family down. Here is where every point came from.
We haven’t run content tests on this model yet, so it has no Freedom Score.
What it costs and how long it takes
How this is scoredMeasured, never scored. Price comes from the live catalogue; speed from real jobs over the last 30 days.
- Price
- $4.00 per 1M mixed tokens (3 input : 1 output)
- Success rate
- Not published yet for any model. Success rates go live for every family at the same time once 30 days of real traffic are in.
- Output speed
- 30 tok/sIncludes time to first token
- Success rate
- Collecting data
A time appears once at least 10 completed jobs are in. Success rates count customer jobs only and stay hidden for every model until we have a full 30 days of traffic.
Objective and independent
SpicyAPI sells access to this model. Its scores come only from the published tables and the test records on this page. Price, commercial terms and supply arrangements play no part.