Zhipu AI releases GLM-5.2 with 1M token context and 62.1% SWE-bench Pro score

Zhipu AI released GLM-5.2, a 753 billion parameter model with a 1 million token context window and enhanced coding capabilities. The model scores 62.1% on SWE-bench Pro, positioning it between GPT-5.5 (58.6%) and Claude Opus 4.8 (69.2%) according to the company's benchmarks.

Key specifications

GLM-5.2 achieves the following benchmark scores according to Zhipu AI:

• SWE-bench Pro: 62.1%
• NL2Repo: 48.9%
• DeepSWE: 46.2%
• ProgramBench: 63.7%
• AIME 2026: 99.2%
• GPQA-Diamond: 91.2%
• HMMT November 2025: 94.4%

The model supports 1 million token context length and is available in FP8 quantization format. Parameter count is 753 billion. Pricing has not been disclosed.

Technical architecture

GLM-5.2 introduces IndexShare, which reuses the same indexer across every four sparse attention layers. According to Zhipu AI, this reduces per-token FLOPs by 2.9× at 1M context length compared to the previous architecture.

The model includes an improved MTP (Multi-Token Prediction) layer for speculative decoding, which the company claims increases acceptance length by up to 20%.

GLM-5.2 offers multiple "thinking effort levels" for coding tasks, allowing developers to balance between performance and latency depending on task complexity.

Deployment and availability

The model is released under MIT open-source license with no regional restrictions. It supports deployment through:

• SGLang (v0.5.13.post1+)
• vLLM (v0.23.0+)
• Transformers (v0.5.12+)
• KTransformers (v0.5.12+)

For Ascend NPU platforms, vLLM-Ascend, xLLM, and SGLang are supported.

API access is available through Z.ai API Platform, though pricing details have not been published.

Benchmark positioning

On coding benchmarks, GLM-5.2 shows improvements over its predecessor GLM-5.1 (58.4% on SWE-bench Pro) and claims to match or exceed Qwen3.7-Max (60.6%) and MiniMax M3 (59%). However, it trails Claude Opus 4.8 (69.2%) and DeepSeek-V4-Pro (55.4%) on several metrics.

On the HLE reasoning benchmark, GLM-5.2 scores 40.5, behind Claude Opus 4.8 (49.8) and Gemini 3.1 Pro (45), but ahead of DeepSeek-V4-Pro (37.7) and MiniMax M3 (37).

What this means

GLM-5.2 represents Zhipu AI's push into the 1M context space dominated by models like Gemini 2.5 Pro and Claude 3.7 Sonnet. The IndexShare architecture addresses a key challenge in long-context models: computational efficiency at extended lengths. The 2.9× reduction in FLOPs at 1M tokens could make the model more practical for deployment compared to architectures that scale linearly with context length. The MIT license removes barriers common in Chinese AI models, potentially increasing adoption in Western markets. However, without disclosed pricing and independent benchmark verification, actual competitiveness against Anthropic and OpenAI's offerings remains to be demonstrated in production environments.