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Grok Code Fast 1 vs GLM 5.3 Flash

At a glance

Speedy reasoning model built for agentic coding.

256K ctx

Z.ai's efficient multimodal model for fast coding and long-horizon agent tasks.

1.0M ctx$0.07/$0.25 per M
Demos
All demos

No shared demos for these models yet.

AI Output
All AI outputs

No captured outputs for these models yet.

Benchmarks
See rankings
CodingInsufficient data
ReasoningInsufficient data
MathInsufficient data
Sources:Epoch AI· as of 2026-07-10
Agentic
Terminal Tasks25.8%
Reasoning
CodingInsufficient data
AgenticInsufficient data
ReasoningInsufficient data
MathInsufficient data
Sources:OpenRouter
Agentic
Terminal Tasks—
Specs
256K
Context
33K
Max output
—
Released
1.0M
Context
131K
Max output
Aug 2026
Released
Capabilities
Vision
Audio
Reasoning
Vision
Audio
Reasoning
Pricing
Pricing not available
Live pricing, shown before you run
Input$0.07/M tokens
Output$0.25/M tokens
Cache read$0.01/M tokens
Chat with Grok Code Fast 1Go to model
Chat with GLM 5.3 FlashGo to model
Frequently Asked Questions: Grok Code Fast 1 vs GLM 5.3 Flash▼

Which is better, Grok Code Fast 1 or GLM 5.3 Flash?

▼

Both Grok Code Fast 1 and GLM 5.3 Flash 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 has a larger context window, Grok Code Fast 1 or GLM 5.3 Flash?

▼

GLM 5.3 Flash has a larger context window: Grok Code Fast 1 supports 256K tokens vs GLM 5.3 Flash at 1M tokens.

Do both Grok Code Fast 1 and GLM 5.3 Flash support vision?

▼

GLM 5.3 Flash supports vision/image input, but Grok Code Fast 1 does not.

What are the key differences between Grok Code Fast 1 and GLM 5.3 Flash?

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Key differences: only GLM 5.3 Flash supports vision input; only GLM 5.3 Flash offers extended reasoning mode. 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 Grok Code Fast 1 and GLM 5.3 Flash for free on idapt.app to see which performs better for your specific needs.

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