Model comparison
Seed 2.0 Pro vs Grok 4.1 Fast
Seed 2.0 Pro is the stronger model overall, scoring 43.2 to 41.4 on the Noometry Index. Grok 4.1 Fast costs 4.1× less per token, which makes it the better buy when Seed 2.0 Pro's lead doesn't matter for your workload.
Last verified . 19 shared benchmarks.
ByteDance SeedSummary
- They share 19 benchmarks with published results for both. Seed 2.0 Pro scores higher in 8 categories and Grok 4.1 Fast in 1 category; 9 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Grok 4.1 Fast leads 43.4 to 24.1.
- The biggest single-benchmark swing is NYT Connections (extended): 28.4% for Seed 2.0 Pro and 87.4% for Grok 4.1 Fast.
- Grok 4.1 Fast is cheaper at $0.20 / $0.50 per million input/output tokens, against $0.50 / $3 for Seed 2.0 Pro.
- Seed 2.0 Pro accepts more context: 256K tokens versus 128K.
Side by side
| Seed 2.0 Pro | Grok 4.1 Fast | |
|---|---|---|
| Provider | ByteDance Seed | xAI |
| Noometry Index | 43.2 | 41.4 |
| Released | 2026-02-14 | 2025-06-27 |
| Weights | Proprietary | Proprietary |
| Context window | 256K | 128K |
| Max output | 128K | 30K |
| Input $ / M tokens | $0.50 | $0.20 |
| Output $ / M tokens | $3 | $0.50 |
| Results tracked | 20 | 32 |
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Category by category
Coding Seed 2.0 Pro leads
Seed 2.0 Pro: 43.5 (#86), Grok 4.1 Fast: 34.1 (#245)
| Benchmark | Seed 2.0 Pro | Grok 4.1 Fast |
|---|---|---|
| LMArena Coding | 1472 | 1411 |
| LMArena WebDev | — | 1242 |
| ALE-Bench | — | 394.93 |
Agentic & Tool Use Not comparable
Seed 2.0 Pro: —, Grok 4.1 Fast: 36.3 (#39)
| Benchmark | Seed 2.0 Pro | Grok 4.1 Fast |
|---|---|---|
| Berkeley Function Calling Leaderboard | — | 69.6% |
| τ²-bench Banking | — | 13.1% |
| LMArena Search | — | 1171 |
| Vending-Bench 2 | — | 1,107 |
Reasoning Grok 4.1 Fast leads
Seed 2.0 Pro: 24.1 (#165), Grok 4.1 Fast: 43.4 (#49)
| Benchmark | Seed 2.0 Pro | Grok 4.1 Fast |
|---|---|---|
| NYT Connections (extended) | 28.4% | 87.4% |
| LMArena Hard Prompts | 1453 | 1407 |
| SimpleBench | — | 56% |
| Thematic Generalization | 57.1% | — |
| DTBench | — | 87.7% |
| ForecastBench | — | 61 |
Math Seed 2.0 Pro leads
Seed 2.0 Pro: 39.3 (#108), Grok 4.1 Fast: 31.9 (#221)
| Benchmark | Seed 2.0 Pro | Grok 4.1 Fast |
|---|---|---|
| LMArena Math | 1439 | 1408 |
| MathArena Final-Answer Competitions | — | 60.9% |
| ProofBench | — | 4% |
Knowledge Seed 2.0 Pro leads
Seed 2.0 Pro: 40.2 (#122), Grok 4.1 Fast: 33.1 (#207)
| Benchmark | Seed 2.0 Pro | Grok 4.1 Fast |
|---|---|---|
| LMArena Expert | 1440 | 1399 |
| Vectara Hallucination Rate | — | 17.8% |
Multimodal Seed 2.0 Pro leads
Seed 2.0 Pro: 41.5 (#35), Grok 4.1 Fast: 37.0 (#76)
| Benchmark | Seed 2.0 Pro | Grok 4.1 Fast |
|---|---|---|
| LMArena Vision | 1274 | 1201 |
Multilingual Seed 2.0 Pro leads
Seed 2.0 Pro: 54.5 (#39), Grok 4.1 Fast: 51.0 (#114)
| Benchmark | Seed 2.0 Pro | Grok 4.1 Fast |
|---|---|---|
| LMArena Non-English | 1441 | 1391 |
| LMArena Chinese | 1489 | 1441 |
| LMArena French | 1471 | 1415 |
| LMArena German | 1442 | 1404 |
| LMArena Japanese | 1408 | 1349 |
| LMArena Korean | 1411 | 1361 |
| LMArena Russian | 1449 | 1387 |
| LMArena Spanish | 1460 | 1413 |
Instruction Following Seed 2.0 Pro leads
Seed 2.0 Pro: 74.5 (#91), Grok 4.1 Fast: 72.7 (#133)
| Benchmark | Seed 2.0 Pro | Grok 4.1 Fast |
|---|---|---|
| LMArena Instruction Following | 1414 | 1376 |
Long Context Seed 2.0 Pro leads
Seed 2.0 Pro: 43.6 (#90), Grok 4.1 Fast: 42.4 (#126)
| Benchmark | Seed 2.0 Pro | Grok 4.1 Fast |
|---|---|---|
| LMArena Longer Query | 1428 | 1390 |
Writing & Preference Seed 2.0 Pro leads
Seed 2.0 Pro: 62.9 (#69), Grok 4.1 Fast: 57.2 (#131)
| Benchmark | Seed 2.0 Pro | Grok 4.1 Fast |
|---|---|---|
| LMArena Text | 1448 | 1408 |
| LMArena Creative Writing | 1406 | 1394 |
| LMArena Multi-Turn | 1441 | 1389 |
| EQ-Bench Creative Writing | — | 1327 |
Frequently asked questions
Is Seed 2.0 Pro better than Grok 4.1 Fast?
Seed 2.0 Pro is the stronger model overall, scoring 43.2 to 41.4 on the Noometry Index. Grok 4.1 Fast costs 4.1× less per token, which makes it the better buy when Seed 2.0 Pro's lead doesn't matter for your workload.
Which is cheaper, Seed 2.0 Pro or Grok 4.1 Fast?
Grok 4.1 Fast is cheaper. It lists at $0.20 per million input tokens and $0.50 per million output tokens; Seed 2.0 Pro lists at $0.50 and $3.
Is Seed 2.0 Pro or Grok 4.1 Fast better for coding?
Seed 2.0 Pro scores higher on coding benchmarks: 43.5 versus 34.1 in the Noometry coding category.
Which has the bigger context window?
Seed 2.0 Pro does, with 256K tokens against 128K.
How many benchmarks do Seed 2.0 Pro and Grok 4.1 Fast share?
19 benchmarks have published results for both models. Seed 2.0 Pro has 20 scored results on Noometry and Grok 4.1 Fast has 32.