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GLM 5.3 FlashX vs Kimi K3

At a glance

Z.ai's high-speed variant of GLM 5.3 Flash, generating up to 200 tokens per second.

1.0M ctx$0.37/$1.25 per M

MoonshotAI's 2.8T-parameter flagship for complex coding, knowledge work, and long-horizon agent runs.

1.0M ctx$0.44/$10.00 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
Reasoning
CodingInsufficient data
AgenticInsufficient data
ReasoningInsufficient data
MathInsufficient data
Sources:OpenRouter
Cheaper79%
Reasoning & Knowledge
Graduate Science—Expert-Level—Factual Recall—
Math
Competition Math—
Agentic
Terminal Tasks—Novel Reasoning—
Reasoning
CodingInsufficient data
Sources:Epoch AI·Provider·OpenRouter· as of 2026-10-02
Reasoning & Knowledge
Graduate Science93.5%Expert-Level43.5%Factual Recall50.6%
Math
Competition Math97.2%
Agentic
Terminal Tasks88.3%Novel Reasoning60.4%
Specs
1.0M
Context
131K
Max output
Sep 2026
Released
1.0M
Context
256K
Max output
Jul 2026
Released
Capabilities
Vision
Audio
Reasoning
Vision
Audio
Reasoning
Pricing
Live pricing, shown before you run
Input15%$0.37/M tokens
Output88%$1.25/M tokens
Cache read79%$0.09/M tokens
Live pricing, shown before you run
Input$0.44/M tokens
Output$10.00/M tokens
Cache read$0.44/M tokens
Chat with GLM 5.3 FlashXGo to model
Chat with Kimi K3Go to model
Frequently Asked Questions: GLM 5.3 FlashX vs Kimi K3▼

Which is better, GLM 5.3 FlashX or Kimi K3?

▼

Both GLM 5.3 FlashX and Kimi K3 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, GLM 5.3 FlashX or Kimi K3?

▼

GLM 5.3 FlashX has a lower blended cost. GLM 5.3 FlashX: $0.37 input / $1.25 output. Kimi K3: $0.44 input / $10.00 output.

Which has a larger context window, GLM 5.3 FlashX or Kimi K3?

▼

GLM 5.3 FlashX has a larger context window: GLM 5.3 FlashX supports 1M tokens vs Kimi K3 at 1M tokens.

Do both GLM 5.3 FlashX and Kimi K3 support vision?

▼

Yes, both GLM 5.3 FlashX and Kimi K3 support vision/image input.

What are the key differences between GLM 5.3 FlashX and Kimi K3?

▼

GLM 5.3 FlashX and Kimi K3 have similar overall capabilities. The main differences lie in pricing, context window size, and provider-specific strengths. Use this comparison page to review all metrics side by side.

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 GLM 5.3 FlashX and Kimi K3 for free on idapt.app to see which performs better for your specific needs.

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