Model comparison
Kimi K2.5 Instant vs o3-pro
Kimi K2.5 Instant and o3-pro score almost the same on the Noometry Index (43.6 vs 42.9), so choose on price, context window or the category you care about most.
Last verified . 0 shared benchmarks.
Summary
- The widest gap is in long context, where o3-pro leads 72.2 to 43.9.
- Kimi K2.5 Instant has downloadable open weights; the other is API-only.
Side by side
| Kimi K2.5 Instant | o3-pro | |
|---|---|---|
| Provider | Moonshot AI | OpenAI |
| Noometry Index | 43.6 | 42.9 |
| Released | — | 2025-06-10 |
| Weights | Open | Proprietary |
| Context window | — | 200K |
| Max output | — | 100K |
| Input $ / M tokens | — | $20 |
| Output $ / M tokens | — | $80 |
| Results tracked | 18 | 12 |
Sponsored placements are available on pages like this one. Advertise on Noometry
Category by category
Coding o3-pro leads
Kimi K2.5 Instant: 42.6 (#97), o3-pro: 55.5 (#24)
| Benchmark | Kimi K2.5 Instant | o3-pro |
|---|---|---|
| Aider Polyglot | — | 84.9% |
| LMArena WebDev | 1404 | — |
| WeirdML | — | 58.2% |
| LMArena Coding | 1484 | — |
Reasoning Kimi K2.5 Instant leads
Kimi K2.5 Instant: 29.7 (#90), o3-pro: 23.8 (#171)
| Benchmark | Kimi K2.5 Instant | o3-pro |
|---|---|---|
| ARC-AGI-2 | — | 4.9% |
| Kagi LLM Benchmark | — | 72.1% |
| ARC-AGI-1 | — | 59.3% |
| LMArena Hard Prompts | 1443 | — |
| DTBench | — | 86.9% |
| LMCA | — | 38.5% |
| Epoch Capabilities Index | — | 147.42 |
Math Not comparable
Kimi K2.5 Instant: 39.4 (#105), o3-pro: —
| Benchmark | Kimi K2.5 Instant | o3-pro |
|---|---|---|
| LMArena Math | 1442 | — |
Knowledge Kimi K2.5 Instant leads
Kimi K2.5 Instant: 40.2 (#123), o3-pro: 29.5 (#238)
| Benchmark | Kimi K2.5 Instant | o3-pro |
|---|---|---|
| Confabulations | — | 14.2% |
| Vectara Hallucination Rate | — | 23.3% |
| LMArena Expert | 1440 | — |
Multimodal Not comparable
Kimi K2.5 Instant: 40.2 (#50), o3-pro: —
| Benchmark | Kimi K2.5 Instant | o3-pro |
|---|---|---|
| LMArena Vision | 1254 | — |
Multilingual Not comparable
Kimi K2.5 Instant: 52.0 (#94), o3-pro: —
| Benchmark | Kimi K2.5 Instant | o3-pro |
|---|---|---|
| LMArena Non-English | 1406 | — |
| LMArena Chinese | 1449 | — |
| LMArena French | 1403 | — |
| LMArena German | 1413 | — |
| LMArena Korean | 1378 | — |
| LMArena Russian | 1404 | — |
| LMArena Spanish | 1447 | — |
Instruction Following Not comparable
Kimi K2.5 Instant: 75.3 (#65), o3-pro: —
| Benchmark | Kimi K2.5 Instant | o3-pro |
|---|---|---|
| LMArena Instruction Following | 1430 | — |
Long Context o3-pro leads
Kimi K2.5 Instant: 43.9 (#83), o3-pro: 72.2 (#1)
| Benchmark | Kimi K2.5 Instant | o3-pro |
|---|---|---|
| Fiction.LiveBench | — | 97.2% |
| LMArena Longer Query | 1435 | — |
Writing & Preference Kimi K2.5 Instant leads
Kimi K2.5 Instant: 60.6 (#95), o3-pro: 57.1 (#133)
| Benchmark | Kimi K2.5 Instant | o3-pro |
|---|---|---|
| LMArena Text | 1420 | — |
| LMArena Creative Writing | 1381 | — |
| Short-Story Creative Writing | — | 84.4% |
| LMArena Multi-Turn | 1427 | — |
Frequently asked questions
Is Kimi K2.5 Instant better than o3-pro?
Kimi K2.5 Instant and o3-pro score almost the same on the Noometry Index (43.6 vs 42.9), so choose on price, context window or the category you care about most.
Is Kimi K2.5 Instant or o3-pro better for coding?
o3-pro scores higher on coding benchmarks: 55.5 versus 42.6 in the Noometry coding category.
How many benchmarks do Kimi K2.5 Instant and o3-pro share?
0 benchmarks have published results for both models. Kimi K2.5 Instant has 18 scored results on Noometry and o3-pro has 12.