Compare / head-to-head
Qwen3.5 4Bvs
Seed-OSS-36B-Instruct
Seed-OSS-36B-Instruct leads 4 of 6 shared benchmarks. Seed-OSS-36B-Instruct has the larger context window (512K tokens).
Benchmarks from cited public sources; pricing from official pages; status from official provider feeds.
Shared benchmarks
2 – 4
Seed-OSS-36B-Instruct leads
Cheaper per token
—
list price, input + output
Larger context
Seed-OSS-36B-Instruct
512K tokens
Providers
2 providers
Qwen · ByteDance Seed
Qwen3.5 4B
Qwen · released 2026-03-02
textvisionvideo
- Context
- 262K
- Max out
- —
- Input /1M
- —
- Output /1M
- —
- Cached /1M
- —
- Scores
- 16 · 5 core
Seed-OSS-36B-Instruct
ByteDance Seed · released 2025-08-20
text
- Context
- 512K
- Max out
- —
- Input /1M
- —
- Output /1M
- —
- Cached /1M
- —
- Scores
- 18 · 12 core
Quality
Benchmark matrix
6 shared · 10 only Qwen3.5 4B · 12 only Seed-OSS-36B-Instruct| Benchmark | Qwen3.5 4B | Seed-OSS-36B-Instruct | Δ | Edge |
|---|---|---|---|---|
| Reported by both · 6 | ||||
| GPQA Diamond | 76.2% ↗ | 71.5% ↗epoch run | +4.7 pt | Qwen3.5 4B |
| MMLU-Pro | 79.1% ↗ | 82.7% ↗ | -3.6 pt | Seed-OSS-36B-Instruct |
| IFEval | 89.8% ↗ | 85.8% ↗ | +4 pt | Qwen3.5 4B |
| MMMLU | 76.1% ↗ | 78.4% ↗ | -2.3 pt | Seed-OSS-36B-Instruct |
| OTIS Mock AIME 2024-2025 (Epoch AI run) | 55.8% ↗epoch run | 67.5% ↗epoch run | -11.7 pt | Seed-OSS-36B-Instruct |
| SuperGPQA | 52.9% ↗ | 55.7% ↗ | -2.8 pt | Seed-OSS-36B-Instruct |
| Only Qwen3.5 4B reports · 10 | ||||
| BFCL-V4 | 50.3% ↗ | not reported | — | — |
| HMMT Feb 25 | 74% ↗ | not reported | — | — |
| IFBench | 59.2% ↗ | not reported | — | — |
| LiveCodeBench v6 | 55.8% ↗ | not reported | — | — |
| LongBench v2 | 50% ↗ | not reported | — | — |
| MMLU-Redux | 88.8% ↗ | not reported | — | — |
| MMMU | 77.6% ↗ | not reported | — | — |
| MMMU-Pro | 66.3% ↗ | not reported | — | — |
| OSWorld-Verified | 35.6% ↗ | not reported | — | — |
| TAU2-Bench | 79.9% ↗ | not reported | — | — |
| Only Seed-OSS-36B-Instruct reports · 12 | ||||
| MMLU | not reported | 87.4% ↗ | — | — |
| AIME24 | not reported | 91.7% ↗ | — | — |
| AIME25 | not reported | 84.7% ↗ | — | — |
| BeyondAIME | not reported | 65% ↗ | — | — |
| Chess Puzzles (Epoch AI run) | not reported | 13% ↗epoch run | — | — |
| GPQA-D | not reported | 71.4% ↗ | — | — |
| HLE | not reported | 10.1% ↗ | — | — |
| LiveCodeBench v6 (02/2025-05/2025) | not reported | 67.4% ↗ | — | — |
| Multi-SWE-Bench | not reported | 17% ↗ | — | — |
| RULER (128K) | not reported | 94.6% ↗ | — | — |
| SWE-Bench Verified (OpenHands) | not reported | 56% ↗ | — | — |
| TAU1-Retail | not reported | 70.4% ↗ | — | — |
Scores tagged "epoch" or "matharena" are independent runs, used only where the lab has not published its own; ⚠ marks rows MathArena flags as released after the competition. Higher is better on every row. Δ is Qwen3.5 4B minus Seed-OSS-36B-Instruct in the benchmark's own unit. "Not reported" means the lab has not published that figure; it is not a zero. ↗ opens the source.
Specs & pricing
Side by side
Official pricing pages and model cards| Spec | Qwen3.5 4B | Seed-OSS-36B-Instruct | Edge |
|---|---|---|---|
| Context window | 262K tokens | 512K tokens | Seed-OSS-36B-Instruct |
| Max output | — | — | — |
| Input price / 1M | — | — | — |
| Output price / 1M | — | — | — |
| Cached input / 1M | — | — | — |
| Input + output / 1M Lower is cheaper. List prices; batch, tool and regional fees excluded. | — | — | — |
| Modalities | text · vision · video | text | Qwen3.5 4B |
| Released | 2026-03-02 | 2025-08-20 | — |
| Cited benchmark scores | 16 | 18 | — |
Reliability
Provider status
Live from /statusMore matchups
Qwen3.5 4B vs …
Models sharing the most benchmarksMore matchups
Seed-OSS-36B-Instruct vs …
Models sharing the most benchmarksBuilt by Respan
Which one wins on your data?
Public benchmarks are a starting point. Run Qwen3.5 4B and Seed-OSS-36B-Instruct on your own prompts with Respan evals, or route to either through one gateway key with automatic failover.