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2026-08-02

Qwen3.8-Max

by Qwen

Open weights API: openrouter Endpoint: qwen/qwen3.8-max

Expected Performance

56.1%

Expected Rank

#12

Expected Cost / Problem

$3.07

Competition performance

Competition Accuracy Rank Cost Output Tokens
06/2026 ArXivLean
45.65% ± 14.39% 3/14 $10.27 437952
Overall BrokenArXiv
48.71% ± 5.93% 8/12 $1.52 142278
04/2026 BrokenArXiv
45.49% ± 8.84% 6/19 $0.35 57731
05/2026 BrokenArXiv
32.50% ± 9.18% 12/23 $0.39 65360
06/2026 BrokenArXiv
43.98% ± 9.36% 15/28 $0.38 63195
08/2026 BrokenArXiv
69.64% ± 12.04% 8/13 $3.64 298279
Overall ArXivMath
67.59% ± 5.59% 6/12 $2.49 140190
04/2026 ArXivMath
59.17% ± 8.79% 9/23 $0.30 49511
05/2026 ArXivMath
69.17% ± 8.26% 10/26 $0.35 58574
06/2026 ArXivMath
75.69% ± 7.01% 12/29 $0.39 64770
08/2026 ArXivMath
57.89% ± 12.82% 8/13 $5.76 297226

06/2026 ArXivLean

Accuracy 45.65%
CI: ± 14.39%
Rank: 3/14
Cost: $10.27
Output Tokens: 437952

Overall BrokenArXiv

Accuracy 48.71%
CI: ± 5.93%
Rank: 8/12
Cost: $1.52
Output Tokens: 142278

04/2026 BrokenArXiv

Accuracy 45.49%
CI: ± 8.84%
Rank: 6/19
Cost: $0.35
Output Tokens: 57731

05/2026 BrokenArXiv

Accuracy 32.50%
CI: ± 9.18%
Rank: 12/23
Cost: $0.39
Output Tokens: 65360

06/2026 BrokenArXiv

Accuracy 43.98%
CI: ± 9.36%
Rank: 15/28
Cost: $0.38
Output Tokens: 63195

08/2026 BrokenArXiv

Accuracy 69.64%
CI: ± 12.04%
Rank: 8/13
Cost: $3.64
Output Tokens: 298279

Overall ArXivMath

Accuracy 67.59%
CI: ± 5.59%
Rank: 6/12
Cost: $2.49
Output Tokens: 140190

04/2026 ArXivMath

Accuracy 59.17%
CI: ± 8.79%
Rank: 9/23
Cost: $0.30
Output Tokens: 49511

05/2026 ArXivMath

Accuracy 69.17%
CI: ± 8.26%
Rank: 10/26
Cost: $0.35
Output Tokens: 58574

06/2026 ArXivMath

Accuracy 75.69%
CI: ± 7.01%
Rank: 12/29
Cost: $0.39
Output Tokens: 64770

08/2026 ArXivMath

Accuracy 57.89%
CI: ± 12.82%
Rank: 8/13
Cost: $5.76
Output Tokens: 297226

Sampling parameters

Model
qwen/qwen3.8-max
API
openrouter
Display Name
Qwen3.8-Max
Release Date
2026-08-02
Open Source
Yes
Creator
Qwen
Parameters (B)
2400
Active Parameters (B)
95
Max Tokens
131072
Temperature
1.0
Top-p
0.95
Read cost ($ per 1M)
2
Write cost ($ per 1M)
6
Concurrent Requests
64

Additional parameters

{
  "cache_read_cost": 0.25,
  "extra_body": {
    "provider": {
      "allow_fallbacks": false,
      "order": [
        "alibaba"
      ]
    },
    "top_k": 20
  },
  "harness": "qwen",
  "harness_config": {
    "auth": "api",
    "container_executable": "qwen",
    "environment": {
      "QWEN_STREAM_MAX_LIFETIME_MS": "0"
    }
  },
  "harness_version": "0.24.0",
  "huggingface_id": "Qwen/Qwen3.8-2.4T-A95B",
  "reasoning_effort": "max"
}

Most surprising traces (Item Response Theory)

Computed once using a Rasch-style logistic fit; excludes Project Euler where traces are hidden.

Surprising failures

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Surprising successes

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