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Saturday, Aug 29, 2026

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Open-Source GLM-5.3 Beats GPT-5.6 for 3rd Place on Terminal-Bench 4.0, Outperforming OpenAI Best

An independent AI performance test has shifted the competitive landscape between proprietary and local models. GLM-5.3 Max beat GPT-5.6 Max and Sol to secure third place on the Terminal-Bench 4.0 leaderboard, outperforming the flagship offerings from OpenAI.

The benchmark employs tasks designed to prevent "benchmaxxing," a practice where developers optimize models specifically to game test scores. Some users called GPT-5.6 Sol the most overhyped model on the market following the results, which highlight a growing capability for open source intelligence to be run locally.

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Key sources

  1. SOURCE@kimmonismus“GLM-5.3 (max) outperforming GPT-5.6 (max) on the new Terminal-Bench 4.0 was not on my bingo card”x.com
  2. SUPPORT@spac89“an open source model that you can actually run locally competing with, and in this benchmark beating, OpenAI’s best model”x.com
  3. SUPPORT@jun_song“Sol is easily the most overhyped model out there”x.com
  4. SOURCE@zixuanli_“Benchmark iteration is catching up with model development”x.com
  5. SUPPORT@himanshustwts“GLM 5.3 is best open source model out there sharing very close boundary with Fable 5”x.com
  6. SUPPORT@zixuanli_“pushed a version update to the Terminal-Bench dataset and leaderboard”x.com
  7. SUPPORT@andykonwinski“benchmark for evaluating AI agents on research workflows across scientific do…”x.com
  8. SUPPORT@jun_song“Those benchmark scores are from before the nerfs, and right now both are heavily degraded”x.com
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