GLM 5.3 Prime vs Claude Sonnet 5.5 — LLM API Cost Comparison
Compare GLM 5.3 Prime (Zhipu AI (GLM)) vs Claude Sonnet 5.5 (Anthropic) on cost per million tokens, context window, and monthly spend.
Pricing data updated 2026-11-02 · Pricing may change — use the calculator for current estimates
- Input
- $2.8/1M tokens
- Output
- $8.8/1M tokens
- Context
- 1M tokens
- Released
- 2026-09
Auto-added 2026-11; set isCurrent: true after review
- Input
- $2/1M tokens
- Output
- $10/1M tokens
- Context
- 1M tokens
- Released
- 2026-09
Auto-added 2026-11; set isCurrent: true after review
Monthly Cost by Usage Tier (70% input / 30% output ratio)
| Usage | GLM 5.3 Prime | Claude Sonnet 5.5 | Cheaper by |
|---|---|---|---|
| Light (1M tokens) | $4.60 | $4.40 | Claude Sonnet 5.5 (4%) |
| Moderate (10M tokens) | $46.00 | $44.00 | Claude Sonnet 5.5 (4%) |
| Heavy (100M tokens) | $460 | $440 | Claude Sonnet 5.5 (4%) |
| Very Heavy (1B tokens) | $4,600 | $4,400 | Claude Sonnet 5.5 (4%) |
Frequently Asked Questions
Which is cheaper — GLM 5.3 Prime or Claude Sonnet 5.5?
For input tokens, Claude Sonnet 5.5 is cheaper at $2/1M tokens (1.4x lower). For output tokens, GLM 5.3 Prime is cheaper at $8.8/1M tokens. Total cost depends on the input and output mix.
What is the context window difference between GLM 5.3 Prime and Claude Sonnet 5.5?
GLM 5.3 Prime supports 1,000,000 tokens per request; Claude Sonnet 5.5 supports 1,000,000 tokens. Both models have the same listed context window.
When should I choose GLM 5.3 Prime over Claude Sonnet 5.5?
Choose GLM 5.3 Prime (Zhipu AI (GLM)) if you prefer Zhipu AI (GLM)'s ecosystem, tooling, or reliability track record. Auto-added 2026-11; set isCurrent: true after review. Choose Claude Sonnet 5.5 (Anthropic) if Auto-added 2026-11; set isCurrent: true after review. the price/performance fits your workload better. Use this calculator to find the break-even point for your exact token volume.
How much does 1 billion tokens cost on GLM 5.3 Prime vs Claude Sonnet 5.5?
At 700M input + 300M output tokens (1B total): GLM 5.3 Prime costs $4600; Claude Sonnet 5.5 costs $4400. The difference is $200/billion tokens at this 70/30 input/output ratio.