Beam 1.0 501B A23B

Reflection AI
Beam 1.0 501B A23B launch post cover

Cost/1M tokens

input
$0.30
cached
$0.04
output
$1.00
Context
1Mtokens
Listed
3w ago
Size
501Bparameters

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 #108

  1. 1436
  2. 1435
    GPT-5Nearby rank
  3. 1435
    Beam 1.0 501B A23B
  4. 1434
  5. 1434
    GLM 5V TurboNearby rank
  6. 1401
    GPT-5.4 NanoSimilar price
  7. 1391
    MiniMax M2.5Similar price
  8. 1378
    GLM 4.6VSimilar price
  9. 1358
    DeepSeek V3Similar price

Ahead of 4 of 4 similarly priced models

Arena WebDev

Best Arena rating per model · Higher is better

Arena #89

  1. 1624
    MiMo-V2.6-ProSimilar price
  2. 1621
    DeepSeek V4.1 FlashSimilar price
  3. 1519
    GPT-5.6 LunaSimilar price
  4. 1441
  5. 1438
    MiMo-V2.5Nearby rank
  6. 1437
    Beam 1.0 501B A23B
  7. 1436
    Kimi K2.5Nearby rank
  8. 1435
  9. 1386
    MiniMax M2.5Similar price

Ahead of 1 of 4 similarly priced models

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

Arena #45

  1. +0.024
    MiMo-V2.6-ProSimilar price
  2. +0.010
    GLM 5.3Similar price
  3. -0.048
    Qwen3.8 27BNearby rank
  4. -0.054
    Mistral Large 4Nearby rank
  5. -0.059
    Beam 1.0 501B A23B
  6. -0.072
    Qwen3.7 MaxNearby rank
  7. -0.076
    Hy3Nearby rank
  8. -0.080
    Qwen3.7 PlusSimilar price
  9. -0.105
    MiniMax M3Similar price

Ahead of 1 of 4 similarly priced models

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 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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