Compare / head-to-head
GPT-5 nanovsQwen3.5 397B-A17B
Qwen3.5 397B-A17B leads 4 of 4 shared benchmarks. GPT-5 nano is 2.7x cheaper per token. GPT-5 nano has the larger context window (400K tokens).
Benchmarks from cited public sources; pricing from official pages; status from official provider feeds.
Shared benchmarks
0 – 4
Qwen3.5 397B-A17B leads
Cheaper per token
GPT-5 nano
2.7x cheaper, input + output
Larger context
GPT-5 nano
400K tokens
Provider uptime (30d)
94.2446% · —
OpenAI · Qwen
GPT-5 nano
OpenAI · released 2025-08-07
textvision
Qwen3.5 397B-A17B
Qwen · released 2026-02-15
textvision
Quality
Benchmark matrix
4 shared · 3 only GPT-5 nano · 3 only Qwen3.5 397B-A17B| Benchmark | GPT-5 nano | Qwen3.5 397B-A17B | Δ | Edge |
|---|---|---|---|---|
| Reported by both · 4 | ||||
| SWE-bench Verified | 54.7% ↗ | 76.4% ↗ | -21.7 pt | Qwen3.5 397B-A17B |
| GPQA Diamond | 69.4% ↗epoch | 88.4% ↗ | -19 pt | Qwen3.5 397B-A17B |
| FrontierMath Tiers 1-3 v2 (Epoch AI run) | 20% ↗epoch | 29.5% ↗epoch | -9.5 pt | Qwen3.5 397B-A17B |
| OTIS Mock AIME 2024-2025 (Epoch AI run) | 81.1% ↗epoch | 88.9% ↗epoch | -7.8 pt | Qwen3.5 397B-A17B |
| Only GPT-5 nano reports · 3 | ||||
| AIME 2025 | 85% ↗matharena ⚠ | not reported | — | — |
| FrontierMath Tier 4 v2 (Epoch AI run) | 2.4% ↗epoch | not reported | — | — |
| SimpleQA Verified | 11.7% ↗epoch | not reported | — | — |
| Only Qwen3.5 397B-A17B reports · 3 | ||||
| MMLU-Pro | not reported | 87.8% ↗ | — | — |
| AIME 2026 | not reported | 94.2% ↗matharena ⚠ | — | — |
| LMArena Elo | not reported | 1438.3 ↗ | — | — |
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 GPT-5 nano minus Qwen3.5 397B-A17B 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 | GPT-5 nano | Qwen3.5 397B-A17B | Edge |
|---|---|---|---|
| Context window | 400K tokens | 262K tokens | GPT-5 nano |
| Max output | 128K tokens | — | — |
| Input price / 1M | $0.05 ↗ | $0.172 ↗ | GPT-5 nano |
| Output price / 1M | $0.4 ↗ | $1.03 ↗ | GPT-5 nano |
| Cached input / 1M | $0.005 ↗ | — | — |
| Input + output / 1M Lower is cheaper. List prices; batch, tool and regional fees excluded. | $0.45 | $1.2 | GPT-5 nano |
| Modalities | text · vision | text · vision | Tie |
| Released | 2025-08-07 | 2026-02-15 | — |
| Cited benchmark scores | 7 | 8 | — |
Reliability
Provider status
Last 60 days · refreshed daily on this page · live on /statusMore matchups
GPT-5 nano vs …
Models sharing the most benchmarksMore matchups
Qwen3.5 397B-A17B vs …
Models sharing the most benchmarksBuilt by Respan
Which one wins on your data?
Public benchmarks are a starting point. Run GPT-5 nano and Qwen3.5 397B-A17B on your own prompts with Respan evals, or route to either through one gateway key with automatic failover.