DeepSeek V3.1 launch post cover

Cost/1M tokens

input
$0.25
cached
$0.13
output
$0.95
Context
164Ktokens
Released
1y ago
Size
671Bparameters

Benchmarks

DeepSWE is the primary coding benchmark where an exact model evaluation exists. Arena leaderboards and other sourced evaluations appear below; missing scores are not zero.

How it ranks

Against its predecessor, similarly priced models and the models ranked around it.

DeepSWE 1.1

Best pass@1 per model · Higher is better

Not evaluated in DeepSWE 1.1

Arena Text

Best Arena rating per model · Higher is better

Arena #139

  1. 1453
    GPT-5.6 LunaSimilar price
  2. 1421
    R1 0528Nearby rank
  3. 1418
  4. 1417
    DeepSeek V3.1
  5. 1416
  6. 1416
  7. 1395
    DeepSeek V3 0324Predecessor
  8. 1373
    GLM 4.5 AirSimilar price
  9. 1346
    Qwen-PlusSimilar price
  10. 1303

+22 vs DeepSeek V3 0324 (predecessor) · Ahead of 3 of 4 similarly priced models

Arena WebDev

Best Arena rating per model · Higher is better

Not ranked on Arena WebDev yet

Arena Search

Best Arena rating per model · Higher is better

Not ranked on Arena Search yet

Agent Arena

Best IPS score per model · Higher is better

Not ranked on Agent Arena yet

Not evaluated in DeepSWE 1.1 as of 2026-09-22. Results are only shown for exact model versions in the official dataset. Official leaderboard.

All published scores

  • Arena TextArena #1391417

    +22 vs DeepSeek V3 0324 (predecessor)

    • default141795% CI 1411 to 1423 · 14,586 votes
    • default1416thinking95% CI 1409 to 1423 · 11,441 votes

Arena ratings: Arena (lmarena-ai/leaderboard-dataset), licensed CC BY 4.0. Ratings come from pairwise human votes and are only comparable within one leaderboard; the interval is Arena's 95% confidence interval. Model names are matched to the Vertical Tabs catalog.

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