Model comparison
DeepSeek-V3.1-Terminus vs Hy4 preview
Hy4 preview is the stronger model overall, scoring 45.3 to 43.1 on the Noometry Index. DeepSeek-V3.1-Terminus costs 2.5× less per token, which makes it the better buy when Hy4 preview's lead doesn't matter for your workload.
Last verified . 0 shared benchmarks.
DeepSeek
TencentSummary
- The widest gap is in math, where Hy4 preview leads 55.7 to 38.5.
- DeepSeek-V3.1-Terminus is cheaper at $0.27 / $1 per million input/output tokens, against $0.75 / $2.25 for Hy4 preview.
- Hy4 preview accepts more context: 1.05M tokens versus 164K.
Side by side
| DeepSeek-V3.1-Terminus | Hy4 preview | |
|---|---|---|
| Provider | DeepSeek | Tencent |
| Noometry Index | 43.1 | 45.3 |
| Released | 2025-09-22 | 2026-08-28 |
| Weights | Open | Open |
| Context window | 164K | 1.05M |
| Max output | 147K | 64K |
| Input $ / M tokens | $0.27 | $0.75 |
| Output $ / M tokens | $1 | $2.25 |
| Results tracked | 16 | 3 |
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Category by category
Coding Hy4 preview leads
DeepSeek-V3.1-Terminus: 42.0 (#113), Hy4 preview: 51.6 (#38)
| Benchmark | DeepSeek-V3.1-Terminus | Hy4 preview |
|---|---|---|
| LMArena WebDev | — | 1632 |
| SciCode | 40.6% | — |
| LMArena Coding | 1426 | — |
| ALE-Bench | 745.17 | — |
Reasoning Hy4 preview leads
DeepSeek-V3.1-Terminus: 26.4 (#133), Hy4 preview: 31.9 (#79)
| Benchmark | DeepSeek-V3.1-Terminus | Hy4 preview |
|---|---|---|
| Kagi LLM Benchmark | 57.4% | — |
| NYT Connections (extended) | — | 68.2% |
| CritPt | 1.7% | — |
| LMArena Hard Prompts | 1426 | — |
| DTBench | 81.3% | — |
| LMCA | 28.6% | — |
Math Hy4 preview leads
DeepSeek-V3.1-Terminus: 38.5 (#137), Hy4 preview: 55.7 (#42)
| Benchmark | DeepSeek-V3.1-Terminus | Hy4 preview |
|---|---|---|
| ProofBench | — | 75% |
| LMArena Math | 1402 | — |
Multilingual Not comparable
DeepSeek-V3.1-Terminus: 52.1 (#92), Hy4 preview: —
| Benchmark | DeepSeek-V3.1-Terminus | Hy4 preview |
|---|---|---|
| LMArena Non-English | 1407 | — |
| LMArena Russian | 1436 | — |
Instruction Following Not comparable
DeepSeek-V3.1-Terminus: 74.0 (#106), Hy4 preview: —
| Benchmark | DeepSeek-V3.1-Terminus | Hy4 preview |
|---|---|---|
| LMArena Instruction Following | 1404 | — |
Long Context Not comparable
DeepSeek-V3.1-Terminus: 43.4 (#97), Hy4 preview: —
| Benchmark | DeepSeek-V3.1-Terminus | Hy4 preview |
|---|---|---|
| LMArena Longer Query | 1421 | — |
Writing & Preference Not comparable
DeepSeek-V3.1-Terminus: 61.0 (#92), Hy4 preview: —
| Benchmark | DeepSeek-V3.1-Terminus | Hy4 preview |
|---|---|---|
| LMArena Text | 1419 | — |
| LMArena Creative Writing | 1403 | — |
| LMArena Multi-Turn | 1411 | — |
Frequently asked questions
Is DeepSeek-V3.1-Terminus better than Hy4 preview?
Hy4 preview is the stronger model overall, scoring 45.3 to 43.1 on the Noometry Index. DeepSeek-V3.1-Terminus costs 2.5× less per token, which makes it the better buy when Hy4 preview's lead doesn't matter for your workload.
Which is cheaper, DeepSeek-V3.1-Terminus or Hy4 preview?
DeepSeek-V3.1-Terminus is cheaper. It lists at $0.27 per million input tokens and $1 per million output tokens; Hy4 preview lists at $0.75 and $2.25.
Is DeepSeek-V3.1-Terminus or Hy4 preview better for coding?
Hy4 preview scores higher on coding benchmarks: 51.6 versus 42.0 in the Noometry coding category.
Which has the bigger context window?
Hy4 preview does, with 1.05M tokens against 164K.
How many benchmarks do DeepSeek-V3.1-Terminus and Hy4 preview share?
0 benchmarks have published results for both models. DeepSeek-V3.1-Terminus has 16 scored results on Noometry and Hy4 preview has 3.