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GLM-5.3 vs Kimi K3

glm-5.3kimi-k3
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GLM-5.3 costs $0.976972 per 1M input tokens and $3.070483 per 1M output tokens, with a 1M-token context window; Kimi K3 costs $2.093511 per 1M input tokens and $10.467555 per 1M output tokens, with a 1M-token context window.

Side by side

Prices in US dollars; limits and capabilities as published by each model’s provider.

GLM-5.3 and Kimi K3 side by side
SpecGLM-5.3Kimi K3
Input/ 1M tokens$0.976972$2.093511
Output/ 1M tokens$3.070483$10.467555
Cache read/ 1M tokens$0.181438$0.209351
Cache write/ 1M tokens$0$2.093511
Discount30% offList price $1.40 / $4.4030% offList price $3 / $15
Contexttokens1M1M
Max outputtokens128K1M
Input typestexttext, image, video
Output typestexttext
Released2026-08-182026-07-16
Endpoints/v1/chat/completions/v1/responses/v1/chat/completions/v1/responses

Same workload

One workload of 1,000,000 input and 200,000 output tokens, priced at each model’s current rates.

GLM-5.3
$1.5911$0.977 input + $0.6141 output
Kimi K3
$4.187$2.0935 input + $2.0935 output

For this workload, GLM-5.3 costs $2.596 less than Kimi K3.

Same code

Only the model field changes.

curl https://api.cheapaimodel.ai/v1/chat/completions \
  -H "Authorization: Bearer $CHEAPAIMODEL_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "glm-5.3",
    "messages": [{"role": "user", "content": "Hello!"}]
  }'

When to choose which

Differences in the published specs, then each provider’s own description.

  • GLM-5.3 has the lower input price ($0.976972 vs $2.093511 per 1M tokens).
  • GLM-5.3 has the lower output price ($3.070483 vs $10.467555 per 1M tokens).
  • Kimi K3 accepts image and video input; GLM-5.3 doesn’t.
  • GLM-5.3 was released more recently (2026-08-18 vs 2026-07-16).
  • Kimi K3 can return more output in one response (1M vs 128K tokens).

About GLM-5.3

Z.ai's flagship GLM model for complex software engineering and agentic work. It keeps GLM-5.2's base model, with post-training gains in coding, long-horizon tasks and cybersecurity, and currently accepts text input only.

About Kimi K3

Moonshot AI's flagship open-weight model, with 2.8 trillion parameters built on Kimi Delta Attention and Attention Residuals. It has native visual understanding and is designed for long-horizon coding, knowledge work and deep reasoning.

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