Model comparison
Kimi K2.7 Code vs Step 3.5 Flash
Kimi K2.7 Code and Step 3.5 Flash score almost the same on the Noometry Index (43.3 vs 42.3), so choose on price, context window or the category you care about most.
Last verified . 0 shared benchmarks.
StepFunSummary
- The widest gap is in reasoning, where Kimi K2.7 Code leads 39.0 to 22.2.
- Step 3.5 Flash is cheaper at $0.10 / $0.30 per million input/output tokens, against $0.95 / $4 for Kimi K2.7 Code.
- Kimi K2.7 Code accepts more context: 262K tokens versus 256K.
Side by side
| Kimi K2.7 Code | Step 3.5 Flash | |
|---|---|---|
| Provider | Moonshot AI | StepFun |
| Noometry Index | 43.3 | 42.3 |
| Released | 2026-06-12 | 2026-01-29 |
| Weights | Open | Open |
| Context window | 262K | 256K |
| Max output | 262K | 256K |
| Input $ / M tokens | $0.95 | $0.10 |
| Output $ / M tokens | $4 | $0.30 |
| Results tracked | 19 | 19 |
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Category by category
Coding Too close to call
Kimi K2.7 Code: 42.9 (#95), Step 3.5 Flash: 42.4 (#105)
| Benchmark | Kimi K2.7 Code | Step 3.5 Flash |
|---|---|---|
| DeepSWE | 30.5% | — |
| FrontierCode | 30.1% | — |
| LMArena WebDev | 1473 | — |
| SciCode | 47.5% | — |
| WeirdML | 54.1% | — |
| LMArena Coding | — | 1436 |
| ALE-Bench | 886.23 | — |
Agentic & Tool Use Not comparable
Kimi K2.7 Code: 24.0 (#122), Step 3.5 Flash: —
| Benchmark | Kimi K2.7 Code | Step 3.5 Flash |
|---|---|---|
| APEX-Agents | 37.6% | — |
| GBAEval | 0.9% | — |
| Vending-Bench 2 | 5,083 | — |
Reasoning Kimi K2.7 Code leads
Kimi K2.7 Code: 39.0 (#61), Step 3.5 Flash: 22.2 (#202)
| Benchmark | Kimi K2.7 Code | Step 3.5 Flash |
|---|---|---|
| SimpleBench | 57.9% | — |
| NYT Connections (extended) | — | 28.4% |
| CritPt | 10% | — |
| Chess Puzzles | 21% | — |
| LMArena Hard Prompts | — | 1411 |
| Surface Evolver Bench | 48.8% | — |
| Epoch Capabilities Index | 149.97 | — |
Math Kimi K2.7 Code leads
Kimi K2.7 Code: 52.9 (#48), Step 3.5 Flash: 42.6 (#84)
| Benchmark | Kimi K2.7 Code | Step 3.5 Flash |
|---|---|---|
| FrontierMath (Tiers 1-3) | 54% | — |
| FrontierMath Tier 4 | 12.2% | — |
| MathArena Final-Answer Competitions | — | 66.8% |
| OTIS Mock AIME 2024-2025 | 95.6% | — |
| LMArena Math | — | 1408 |
Knowledge Kimi K2.7 Code leads
Kimi K2.7 Code: 53.5 (#57), Step 3.5 Flash: 39.6 (#132)
| Benchmark | Kimi K2.7 Code | Step 3.5 Flash |
|---|---|---|
| GPQA Diamond | 87.9% | — |
| SimpleQA Verified | 36.5% | — |
| LMArena Expert | — | 1421 |
Multilingual Not comparable
Kimi K2.7 Code: —, Step 3.5 Flash: 50.5 (#119)
| Benchmark | Kimi K2.7 Code | Step 3.5 Flash |
|---|---|---|
| LMArena Non-English | — | 1385 |
| LMArena Chinese | — | 1447 |
| LMArena French | — | 1421 |
| LMArena German | — | 1405 |
| LMArena Japanese | — | 1354 |
| LMArena Korean | — | 1352 |
| LMArena Russian | — | 1385 |
| LMArena Spanish | — | 1419 |
Instruction Following Not comparable
Kimi K2.7 Code: —, Step 3.5 Flash: 73.1 (#124)
| Benchmark | Kimi K2.7 Code | Step 3.5 Flash |
|---|---|---|
| LMArena Instruction Following | — | 1385 |
Long Context Not comparable
Kimi K2.7 Code: —, Step 3.5 Flash: 42.8 (#117)
| Benchmark | Kimi K2.7 Code | Step 3.5 Flash |
|---|---|---|
| LMArena Longer Query | — | 1402 |
Writing & Preference Not comparable
Kimi K2.7 Code: —, Step 3.5 Flash: 58.8 (#113)
| Benchmark | Kimi K2.7 Code | Step 3.5 Flash |
|---|---|---|
| LMArena Text | — | 1403 |
| LMArena Creative Writing | — | 1357 |
| LMArena Multi-Turn | — | 1405 |
Frequently asked questions
Is Kimi K2.7 Code better than Step 3.5 Flash?
Kimi K2.7 Code and Step 3.5 Flash score almost the same on the Noometry Index (43.3 vs 42.3), so choose on price, context window or the category you care about most.
Which is cheaper, Kimi K2.7 Code or Step 3.5 Flash?
Step 3.5 Flash is cheaper. It lists at $0.10 per million input tokens and $0.30 per million output tokens; Kimi K2.7 Code lists at $0.95 and $4.
Is Kimi K2.7 Code or Step 3.5 Flash better for coding?
They score almost the same on coding (42.9 vs 42.4); test both on your own repository before choosing.
Which has the bigger context window?
Kimi K2.7 Code does, with 262K tokens against 256K.
How many benchmarks do Kimi K2.7 Code and Step 3.5 Flash share?
0 benchmarks have published results for both models. Kimi K2.7 Code has 19 scored results on Noometry and Step 3.5 Flash has 19.