Benchmark Almanac

FullStackBench

MiniMax-M1-80k 68.3% leads since June 2025
o1-preview 65.6% leads since November 2024
MiniMax-M1-80k 68.3% leads since June 2025
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Models write code for 3,374 problems in 16 programming languages across domains like data analysis and web development. Unit tests score each answer.

Made by
ByteDance Seed
Released
November 2024
Kind
Function-level problems
Level
University
Scored
Checked automatically
Answers
Code
Tasks
All public
Strongest model tested
Qwen3.5-35B-A3B #102 on the capability index
Last in a launch post
February 2026, dropped before it saturated
Last model added
February 2026
Scores refreshed
November 12th, 2026

In the authors’ words

As the capabilities of code large language models (LLMs) continue to expand, their applications across diverse code intelligence domains are rapidly increasing. However, most existing datasets only evaluate limited application domains. To address this gap, we have developed a comprehensive code evaluation dataset FullStack Bench focusing on full-stack programming, which encompasses a wide range of application domains (e.g., basic programming, data analysis, software engineering, mathematics, and machine learning). Besides, to assess multilingual programming capabilities, in FullStack Bench, we design real-world instructions and corresponding unit test cases from 16 widely-used programming languages to reflect real-world usage scenarios rather than simple translations. Moreover, we also release an effective code sandbox execution tool (i.e., SandboxFusion) supporting various programming languages and packages to evaluate the performance of our FullStack Bench efficiently. Comprehensive experimental results on our FullStack Bench demonstrate the necessity and effectiveness of our FullStack Bench and SandboxFusion.

Abstract of FullStack Bench: Evaluating LLMs as Full Stack Coders (arXiv:2412.00535, CC0)
8
Models scored in lab cards
6
Launch posts list it, from 4 labs
5
System cards report it, from 5 labs

MiniMax-M1-80k leads with 68.3% among models released by February 2026

Best score per model as labs report them in their own cards. Labs pick their own settings, so these compare less cleanly than independent runs.

o1-preview leads with 65.6% across all independent runs

Best score per model across the official leaderboard, Epoch AI’s own runs and any board Epoch AI copied. Each bar and row names its source.

MiniMax-M1-80k leads with 68.3%, claims included

Best score per model from every source, including labs’ own numbers and claims Epoch AI collected from reports and papers. Labs pick their own settings, so a claim can beat an independent run of the same model.

The newest model with a score here came out in February 2026, and nobody has reported a newer one. Among the 20 highest-ranked models on the capability index, these have no score yet:

  1. 1 MiniMax-M1-80k 68.3%
  2. 2 Hunyuan-A13B-Instruct 67.8%
  3. 3 ERNIE-4.5-300B-A47B 67.1%
  4. 4 Qwen3.5-122B-A10B 60.7%
  5. 5 Qwen3-Coder-Next 60.6%
  6. 6 Qwen3.5-27B 58.8%
  7. 7 Qwen3.5-35B-A3B 56.5%
  8. 8 Seed-Coder-8B-Instruct 55.8%

Source: Labs’ model cards

#ModelScoreSettingDateSource
1 MiniMax-M1-80k 68.3% Jun 2025 Lab model card
2 Hunyuan-A13B-Instruct 67.8% Jun 2025 Lab model card
3 ERNIE-4.5-300B-A47B 67.1% Jun 2025 Lab model card
4 Qwen3.5-122B-A10B 60.7% Feb 2026 Lab model card
5 Qwen3-Coder-Next 60.6% Feb 2026 Lab model card
6 Qwen3.5-27B 58.8% Feb 2026 Lab model card
7 Qwen3.5-35B-A3B 56.5% Feb 2026 Lab model card
8 Seed-Coder-8B-Instruct 55.8% Jun 2025 Lab model card
#ModelScoreSettingDateSource
1 o1-preview 65.6% Sep 2024 Official leaderboard
2 o1-mini 64.7% Sep 2024 Official leaderboard
3 GPT-4o Aug 2024 61.8% Aug 2024 Official leaderboard
4 DeepSeek-Coder-V2 236B 58.1% Jun 2024 Official leaderboard
5 Qwen2.5-72B 56.9% Sep 2024 Official leaderboard
6 Qwen2.5-Coder-32B-Instruct 56.9% Nov 2024 Official leaderboard
7 Qwen2.5-Coder-14B-Instruct 55.3% Nov 2024 Official leaderboard
8 DeepSeek-Coder-V2-Lite-Instruct 48.7% Jun 2024 Official leaderboard
9 CodeQwen1.5-7B 40.5% Apr 2024 Official leaderboard
10 Code Llama 34B Instruct 29.2% Aug 2023 Official leaderboard
#ModelScoreSettingDateSource
1 MiniMax-M1-80k 68.3% Jun 2025 Lab model card
2 Hunyuan-A13B-Instruct 67.8% Jun 2025 Lab model card
3 ERNIE-4.5-300B-A47B 67.1% Jun 2025 Lab model card
4 o1-preview 65.6% Sep 2024 Official leaderboard
5 o1-mini 64.7% Sep 2024 Official leaderboard
6 GPT-4o Aug 2024 61.8% Aug 2024 Official leaderboard
7 Qwen3.5-122B-A10B 60.7% Feb 2026 Lab model card
8 Qwen3-Coder-Next 60.6% Feb 2026 Lab model card
9 Qwen3.5-27B 58.8% Feb 2026 Lab model card
10 DeepSeek-Coder-V2 236B 58.1% Jun 2024 Official leaderboard
11 Qwen2.5-72B 56.9% Sep 2024 Official leaderboard
12 Qwen2.5-Coder-32B-Instruct 56.9% Nov 2024 Official leaderboard
13 Qwen3.5-35B-A3B 56.5% Feb 2026 Lab model card
14 Seed-Coder-8B-Instruct 55.8% Jun 2025 Lab model card
15 Qwen2.5-Coder-14B-Instruct 55.3% Nov 2024 Official leaderboard
16 DeepSeek-Coder-V2-Lite-Instruct 48.7% Jun 2024 Official leaderboard
17 CodeQwen1.5-7B 40.5% Apr 2024 Official leaderboard
18 Code Llama 34B Instruct 29.2% Aug 2023 Official leaderboard

The benchmark's own leaderboard has 28 entries, 10 of them models we track. Switch the scores above to rank them together.

2 models have held number one in labs’ own numbers since its release in November 2024 Number one over time 2 models have held number one with claims included since its release in November 2024

Lab claims count from the day the card came out, independent runs from the model’s release. We draw one row each for the benchmark’s own leaderboard and what labs claim in their cards.

OpenAI ByteDance Seed MiniMax
Own leaderboard Not tested since Nov 2024
o1-preview 65.6%
Lab claims Not tested since Feb 2026

Sources: Official FullStackBench leaderboard and labs’ model cards

Scores over time

All the scores we have, one dot each, so a model tested at several settings appears more than once.

On the benchmark’s own leaderboard Reported by the lab in its model card Best so far
0% 20% 40% 60% 80% 100% 2024 2025 2026 Near the ceiling (85%) MiniMax-M1-80k o1-preview DeepSeek-Coder-V2 236B DeepSeek-Coder-V2-Lite-Instruct CodeQwen1.5-7B Code Llama 34B Instruct 0% 20% 40% 60% 80% 100% 2024 2025 2026 Near the ceiling (85%) MiniMax-M1-80k GPT-4o

Sources: Official FullStackBench leaderboard and labs’ model cards

Labs headline it less often now, last in February 2026

Launch posts from every lab that has listed it, one tick per post. Tall colored ticks include it, and short gray ones leave it out.

MiniMax
Tencent
Baidu
Qwen
DateLaunch postScoreAs the post writes it
Feb 24, 2026 Qwen3.5-35B-A3B 56.5 Mean of FullStackBench en 58.1 / FullStackBench zh 55.0
Feb 24, 2026 Qwen3.5-27B 58.8 Mean of FullStackBench en 60.1 / FullStackBench zh 57.4
Feb 24, 2026 Qwen3.5-122B-A10B 60.7 Mean of FullStackBench en 62.6 / FullStackBench zh 58.7
Jun 30, 2025 ERNIE-4.5-300B-A47B 67.1 FullStackBench
Jun 27, 2025 Hunyuan-A13B-Instruct 67.8 Fullstackbench
Jun 16, 2025 MiniMax-M1-80k 68.3 FullStackBench

5 system cards report it, from 5 labs

Besides launch posts, we read the system cards, model cards and technical reports labs publish with a release. They report far more, including safety and frontier-risk tests.

DateDocumentScoreAs the document writes itSection
Feb 28, 2026 Qwen3-Coder-Next technical report 60.6 FullStackBench-en, zh 57.38 (Table 7) Capabilities
Jun 29, 2025 ERNIE-4.5-300B-A47B technical report 67.1 FullStackBench (Table 5) Capabilities
Jun 26, 2025 Hunyuan-A13B-Instruct technical report 67.8 FullstackBench, slow-thinking (Table 3). Fast-thinking 58.3 (Table 4) Capabilities
Jun 16, 2025 MiniMax-M1-80k technical report 68.3 FullStackBench, avg of 16 samples (Table 2) Capabilities
Jun 4, 2025 Seed-Coder-8B-Instruct technical report 55.8 FullStack Bench Overall pass@1 (Tables 10 and 11) Capabilities

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