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GPT OSS 20B vs GLM 5.2

At a glance
OpenAIGPT OSS 20B

OpenAI's compact open-weights model for efficient inference.

131K ctx$0.03/$0.14 per M
Zhipu AIGLM 5.2

Z.ai's frontier reasoning model for long-context agents and software engineering.

83262K ctx$1.40/$4.40 per M#16/92
AI Output
All AI outputs

No captured outputs for these models yet.

Benchmarks
See rankings
OpenAIGPT OSS 20B
Reasoning
CodingInsufficient data
ReasoningInsufficient data
MathInsufficient data
Sources:Epoch AI·OpenRouter· as of 2026-07-10
Cheaper
Capability
Capability—
Reasoning & Knowledge
Graduate Science—Factual Recall—
Math
Competition Math—
Coding
Real-World Coding—
Agentic
Terminal Tasks3.4%
Zhipu AIGLM 5.2
Reasoning
AgenticInsufficient data
Sources:Epoch ECI·Epoch AI·OpenRouter· as of 2026-07-10
Capability
CapabilityECI83.4
Reasoning & Knowledge
Graduate Science91.9%Factual Recall38.1%
Math
Competition Math86.4%
Coding
Real-World Coding78.7%
Agentic
Terminal Tasks—
Specs
OpenAIGPT OSS 20B
131K
Context
16K
Max output
Aug 2025
Released
Zhipu AIGLM 5.2
262K
Context
128K
Max output
Jun 2026
Released
Capabilities
OpenAIGPT OSS 20B
Vision
Audio
Reasoning
Zhipu AIGLM 5.2
Vision
Audio
Reasoning
Pricing
OpenAIGPT OSS 20B
Live pricing, shown before you run
Input$0.03/M tokens
Output$0.14/M tokens
Zhipu AIGLM 5.2
Live pricing, shown before you run
Input$1.40/M tokens
Output$4.40/M tokens
Cache read$0.26/M tokens
Chat with GPT OSS 20BGo to model
Chat with GLM 5.2Go to model
Frequently Asked Questions: GPT OSS 20B vs GLM 5.2▼

Which is better, GPT OSS 20B or GLM 5.2?

▼

Both GPT OSS 20B and GLM 5.2 are capable AI models. The best choice depends on your specific use case: consider pricing, context window, speed, and which capabilities (vision, reasoning, audio) you need.

Which is cheaper, GPT OSS 20B or GLM 5.2?

▼

GPT OSS 20B has a lower blended cost. GPT OSS 20B: $0.03 input / $0.14 output. GLM 5.2: $1.40 input / $4.40 output.

Which has a larger context window, GPT OSS 20B or GLM 5.2?

▼

GLM 5.2 has a larger context window: GPT OSS 20B supports 131K tokens vs GLM 5.2 at 262K tokens.

What are the key differences between GPT OSS 20B and GLM 5.2?

▼

Key differences: GPT OSS 20B is significantly cheaper. Compare full specs on this page.

Which model should I choose for my use case?

▼

If cost is your priority, choose the cheaper option. If you need the highest intelligence for complex tasks, pick the higher-scoring model. For long documents or codebases, choose the larger context window. You can try both GPT OSS 20B and GLM 5.2 for free on idapt.app to see which performs better for your specific needs.

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