GLM-5.2 vs Qwen3.8 Flash: Specs & Benchmark Comparison
GLM-5.2 is developed by Zhipu AI, while Qwen3.8 Flash comes from Alibaba. GLM-5.2 was released in June 2026, and Qwen3.8 Flash followed 2 months later in August 2026. GLM-5.2 is the larger model at roughly 753 billion parameters, against 125 billion for Qwen3.8 Flash.
The two models share 6 published benchmarks. Qwen3.8 Flash leads on 4 of them, GLM-5.2 on 2. The widest gaps are on Toolathlon, where Qwen3.8 Flash scores 73.5% against 48.2%; Humanity's Last Exam, where GLM-5.2 scores 54.7% against 35.9%. Averaged across everything we track, GLM-5.2 sits at 60.9% and Qwen3.8 Flash at 68.5%.
Qwen3.8 Flash is the cheaper API at $0.15 per million input tokens and $0.47 per million output tokens, roughly 9 times cheaper than GLM-5.2 at $1.40 and $4.40. Both accept a context window of about 1M tokens. GLM-5.2 accepts text as input, while Qwen3.8 Flash accepts text, images, and video. On tooling, only GLM-5.2 supports function calling and only GLM-5.2 offers structured output.
| Characteristic | GLM-5.2 | Qwen3.8 Flash |
|---|---|---|
| Company | Zhipu AI | Alibaba |
| Release Date | June 16, 2026 | August 26, 2026 |
| Parameters | 753B | 125B |
| Multimodal | No | Yes |
| Context (input) | 1.0M | 1.0M |
| Context (output) | 131K | 131K |
| Input Price / 1M | $1.40 | $0.15 |
| Output Price / 1M | $4.40 | $0.47 |
| Average Score | 60.9% | 68.5% |
| Benchmarks | ||
| Toolathlon | 48.2% | 73.5% |
| Humanity's Last Exam | 54.7% | 35.9% |
| DeepSWE 1.1 | 44.0% | 58.7% |
| NL2Repo | 48.9% | 48.1% |
| GPQA | 91.0% | 91.7% |
| SWE-Bench Pro | 62.1% | 62.5% |
Visual Benchmark Comparison
Verdict
Qwen3.8 Flash leads in 2 out of 4 comparison categories.
Both models show comparable average scores: GLM-5.2 — 0.6, Qwen3.8 Flash — 0.7.
Qwen3.8 Flash is 9.4x cheaper: input $0.15/1M vs $1.40/1M tokens.
Same context size: 1M tokens.
Qwen3.8 Flash is newer: released 8/26/2026 vs 6/16/2026.
More About These Models
Related Comparisons
Frequently Asked Questions
Which is better for coding — GLM-5.2 or Qwen3.8 Flash?
Which model is cheaper — GLM-5.2 or Qwen3.8 Flash?
Which has a larger context window — GLM-5.2 or Qwen3.8 Flash?
The GLM-5.2 and Qwen3.8 Flash comparison is updated for 2026. Data includes benchmark results, API pricing, context window size and other specifications. For more detailed information, visit the GLM-5.2 or Qwen3.8 Flash page. See also the complete list of AI model comparisons.