GLM 5.1
GLM 5.1 is a reasoning model developed by Zhipu AI. It has a large parameter count of approximately 754.0B and a context window of 200K, providing advanced reasoning capabilities.
Parameters
754.0B
Context Window
200K
License
MIT
Release Date
2026-03-27
API Pricing
Input Price (per 1M tokens)
$1.4
Output Price (per 1M tokens)
$
Billing Mode: standard
Strengths
- ・Large 754.0B parameter scale
- ・Long-context processing of 200K tokens
- ・Open use via MIT license
Weaknesses
- ・Extremely large 1.51TB file size
- ・Requires vast compute resources to operate
- ・Loading the model takes time
Use Cases
- ・Reasoning tasks requiring complex logical thinking
- ・Processing and analyzing vast documents
- ・Foundational R&D for large language models
Deep Analysis
Parameters
754B total / 40B active MoE
Code Arena Elo
1530
#3 overall, first open-weight in top 3
SWE-Bench Pro
58.4%
#1 at launch
GPQA Diamond
86.2%
AIME 2026
95.3%
HLE (with tools)
52.3
Leads Opus 4.6 (45.0)
Pricing
$1.40/$4.40 per 1M tokens
License
MIT
Release Date
April 7, 2026
Strengths
- ・First open-weight in Code Arena top 3 (1530 Elo)
- ・SWE-Bench Pro 58.4% #1 at launch
- ・Leads on MCP-Atlas, NL2Repo, CyberGym
- ・MIT license
- ・8+ hour autonomous tasks
Weaknesses
- ・GPQA 86.2 trails Opus 91.3
- ・200K context limiting for monorepos
- ・3x peak-hour pricing surcharge
- ・1.5TB FP8 weights need 8x H200
Competitor Comparison
| Model | Arena | SWE | GPQA | Price |
|---|---|---|---|---|
| Claude Opus 4.6 | 1548 Code | 57.3 Pro | 91.3 | $5/$25 |
| GPT-5.4 | 57.7 Pro | 92.0 | $2.50/$10 | |
| Kimi K2.6 | 58.6 Pro | $0.60/$2.00 |
GLM-5.1 is a post-training refinement optimized for agentic engineering. First open-weight in Code Arena top 3 (1530 Elo), SWE-Bench Pro 58.4% #1 at launch.
Sources
Analysis generated: 2026-05-24