Claude Opus 5.5 vs GLM-5.3-FlashX pricing
- For the Chatbot workload, GLM-5.3-FlashX costs 14× less than Claude Opus 5.5.
- For the RAG workload, GLM-5.3-FlashX costs 12× less than Claude Opus 5.5.
- For the Coding agent workload, GLM-5.3-FlashX costs 9.6× less than Claude Opus 5.5.
Prices
| USD per 1M tokens | Claude Opus 5.5 | GLM-5.3-FlashX |
|---|---|---|
| Input | $4.00 | $0.37 |
| Output | $20.00 | $1.25 |
| Cache read | $0.20 | $0.075 |
| Cache write | $5.00 | Free |
| Batch input | $2.00 | Not published |
| Batch output | $10.00 | Not published |
Verified against the provider's official pricing page on Oct 9, 2026. Official pricing page
Z.AI's list price for its own API, as compiled by models.dev and checked Oct 10, 2026, 09:00 UTC. Prices on cloud platforms and resellers can differ. Provider documentation
Monthly cost by workload
| Workload | Claude Opus 5.5 | GLM-5.3-FlashX |
|---|---|---|
| Chatbot1,000 in / 500 out tokens, 10,000 requests a day | $4,200/mo | $298.50/mo |
| RAG8,000 in / 500 out tokens, 5,000 requests a day | $6,300/mo | $537.75/mo |
| Coding agent50,000 in / 2,000 out tokens, 1,000 requests a day, 80% cached input | $2,640/mo | $276.00/mo |
Cost = input tokens × input price + output tokens × output price, 30 days a month. Cached input uses the cache read price. Cache write fees are not included.
Context and capabilities
| Claude Opus 5.5 | GLM-5.3-FlashX | |
|---|---|---|
| Context | 1,000,000 tokens | 1,000,000 tokens |
| Max output | 128,000 tokens | 131,072 tokens |
| Input | text, image, pdf | text, image, video, pdf |
| Tool calling | Yes | Yes |
| Reasoning | Yes | Yes |
| Structured outputs | Yes | Yes |
Questions
- What is the price difference between Claude Opus 5.5 and GLM-5.3-FlashX?
- Claude Opus 5.5: $4.00 per 1M input tokens and $20.00 per 1M output tokens. GLM-5.3-FlashX: $0.37 per 1M input tokens and $1.25 per 1M output tokens. For the Chatbot workload (1,000 in / 500 out tokens, 10,000 requests a day), that is about $4,200 per month for Claude Opus 5.5 and $298.50 for GLM-5.3-FlashX.
- Which has the longer context window, Claude Opus 5.5 or GLM-5.3-FlashX?
- Both accept up to 1,000,000 tokens of context.
- Do Claude Opus 5.5 and GLM-5.3-FlashX have prompt caching and batch prices?
- Claude Opus 5.5: cached input $0.20 per 1M tokens; batch $2.00 per 1M input tokens and $10.00 per 1M output tokens. GLM-5.3-FlashX: cached input $0.075 per 1M tokens; no batch price published.