Model comparison
Seed 2.0 Pro vs Kimi K2.5
Kimi K2.5 is the stronger model overall, scoring 48.1 to 43.2 on the Noometry Index.
Last verified . 20 shared benchmarks.
ByteDance SeedSummary
- They share 20 benchmarks with published results for both. Seed 2.0 Pro scores higher in 2 categories and Kimi K2.5 in 7 categories; 6 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where Kimi K2.5 leads 53.6 to 40.2.
- The biggest single-benchmark swing is NYT Connections (extended): 28.4% for Seed 2.0 Pro and 69.9% for Kimi K2.5.
- Kimi K2.5 is cheaper at $0.45 / $2.25 per million input/output tokens, against $0.50 / $3 for Seed 2.0 Pro.
- Kimi K2.5 accepts more context: 262K tokens versus 256K.
- Kimi K2.5 has downloadable open weights; the other is API-only.
Side by side
| Seed 2.0 Pro | Kimi K2.5 | |
|---|---|---|
| Provider | ByteDance Seed | Moonshot AI |
| Noometry Index | 43.2 | 48.1 |
| Released | 2026-02-14 | 2026-01-27 |
| Weights | Proprietary | Open |
| Context window | 256K | 262K |
| Max output | 128K | 262K |
| Input $ / M tokens | $0.50 | $0.45 |
| Output $ / M tokens | $3 | $2.25 |
| Results tracked | 20 | 51 |
Sponsored placements are available on pages like this one. Advertise on Noometry
Category by category
Coding Kimi K2.5 leads
Seed 2.0 Pro: 43.5 (#86), Kimi K2.5: 48.8 (#53)
| Benchmark | Seed 2.0 Pro | Kimi K2.5 |
|---|---|---|
| LMArena Coding | 1472 | 1474 |
| SWE-bench Verified | — | 73.8% |
| SWE-bench Verified (bash only) | — | 70.8% |
| LMArena WebDev | — | 1437 |
| SWE-bench Multilingual | — | 67.3% |
| SciCode | — | 49% |
| WeirdML | — | 45.6% |
| ALE-Bench | — | 821.65 |
Agentic & Tool Use Not comparable
Seed 2.0 Pro: —, Kimi K2.5: 34.2 (#48)
| Benchmark | Seed 2.0 Pro | Kimi K2.5 |
|---|---|---|
| Terminal-Bench | — | 43.2% |
| OSWorld | — | 63.3% |
| Vending-Bench 2 | — | 1,198 |
Reasoning Kimi K2.5 leads
Seed 2.0 Pro: 24.1 (#165), Kimi K2.5: 31.2 (#80)
| Benchmark | Seed 2.0 Pro | Kimi K2.5 |
|---|---|---|
| NYT Connections (extended) | 28.4% | 69.9% |
| Thematic Generalization | 57.1% | 69.4% |
| LMArena Hard Prompts | 1453 | 1453 |
| ARC-AGI-2 | — | 11.8% |
| SimpleBench | — | 46.8% |
| Kagi LLM Benchmark | — | 78.5% |
| ARC-AGI-1 | — | 65.3% |
| CritPt | — | 3.1% |
| Chess Puzzles | — | 12% |
| EnigmaEval | — | 3.4% |
| Epoch Capabilities Index | — | 148.03 |
Math Kimi K2.5 leads
Seed 2.0 Pro: 39.3 (#108), Kimi K2.5: 51.8 (#53)
| Benchmark | Seed 2.0 Pro | Kimi K2.5 |
|---|---|---|
| LMArena Math | 1439 | 1470 |
| MathArena Final-Answer Competitions | — | 62.3% |
| OTIS Mock AIME 2024-2025 | — | 92.2% |
| FrontierMath (Feb 2025 set) | — | 27.9% |
| FrontierMath Tier 4 (v1) | — | 4.2% |
Knowledge Kimi K2.5 leads
Seed 2.0 Pro: 40.2 (#122), Kimi K2.5: 53.6 (#56)
| Benchmark | Seed 2.0 Pro | Kimi K2.5 |
|---|---|---|
| LMArena Expert | 1440 | 1466 |
| GPQA Diamond | — | 87.6% |
| Humanity's Last Exam | — | 24.4% |
| SimpleQA Verified | — | 34.3% |
| Vectara Hallucination Rate | — | 14.2% |
Multimodal Too close to call
Seed 2.0 Pro: 41.5 (#35), Kimi K2.5: 41.1 (#39)
| Benchmark | Seed 2.0 Pro | Kimi K2.5 |
|---|---|---|
| LMArena Vision | 1274 | 1269 |
| LMArena Document | — | 1430 |
Multilingual Too close to call
Seed 2.0 Pro: 54.5 (#39), Kimi K2.5: 53.9 (#53)
| Benchmark | Seed 2.0 Pro | Kimi K2.5 |
|---|---|---|
| LMArena Non-English | 1441 | 1433 |
| LMArena Chinese | 1489 | 1495 |
| LMArena French | 1471 | 1454 |
| LMArena German | 1442 | 1441 |
| LMArena Japanese | 1408 | 1421 |
| LMArena Korean | 1411 | 1410 |
| LMArena Russian | 1449 | 1435 |
| LMArena Spanish | 1460 | 1450 |
Instruction Following Too close to call
Seed 2.0 Pro: 74.5 (#91), Kimi K2.5: 75.3 (#64)
| Benchmark | Seed 2.0 Pro | Kimi K2.5 |
|---|---|---|
| LMArena Instruction Following | 1414 | 1431 |
Long Context Kimi K2.5 leads
Seed 2.0 Pro: 43.6 (#90), Kimi K2.5: 52.1 (#7)
| Benchmark | Seed 2.0 Pro | Kimi K2.5 |
|---|---|---|
| LMArena Longer Query | 1428 | 1445 |
| Fiction.LiveBench | — | 86.1% |
| CL-bench | — | 19.3% |
| CL-bench Life | — | 13.2% |
Writing & Preference Kimi K2.5 leads
Seed 2.0 Pro: 62.9 (#69), Kimi K2.5: 65.1 (#53)
| Benchmark | Seed 2.0 Pro | Kimi K2.5 |
|---|---|---|
| LMArena Text | 1448 | 1445 |
| LMArena Creative Writing | 1406 | 1423 |
| LMArena Multi-Turn | 1441 | 1444 |
| EQ-Bench Creative Writing | — | 1579 |
Frequently asked questions
Is Seed 2.0 Pro better than Kimi K2.5?
Kimi K2.5 is the stronger model overall, scoring 48.1 to 43.2 on the Noometry Index.
Which is cheaper, Seed 2.0 Pro or Kimi K2.5?
Kimi K2.5 is cheaper. It lists at $0.45 per million input tokens and $2.25 per million output tokens; Seed 2.0 Pro lists at $0.50 and $3.
Is Seed 2.0 Pro or Kimi K2.5 better for coding?
Kimi K2.5 scores higher on coding benchmarks: 48.8 versus 43.5 in the Noometry coding category.
Which has the bigger context window?
Kimi K2.5 does, with 262K tokens against 256K.
How many benchmarks do Seed 2.0 Pro and Kimi K2.5 share?
20 benchmarks have published results for both models. Seed 2.0 Pro has 20 scored results on Noometry and Kimi K2.5 has 51.