Claude Sonnet 5 (Free)
ZenMux
Claude Sonnet 5 (Free) by ZenMux costs $0.00 per 1M input tokens and $0.00 per 1M output tokens, with a 1M-token context window.
Pricing
Input (per 1M tokens)
$0.00
Output (per 1M tokens)
$0.00
Cached input (per 1M)
$0.00
Specifications
- Provider
- ZenMux
- Context window
- 1M tokens
- Parameters
- —
- Released
- Jun 2026
- Open weights
- No
- Frontier model
- No
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FAQ
How much does Claude Sonnet 5 (Free) cost?
Claude Sonnet 5 (Free) is priced at $0.00 per 1M input tokens and $0.00 per 1M output tokens. Output tokens cost more than input.
What is Claude Sonnet 5 (Free)'s context window?
Claude Sonnet 5 (Free) supports a context window of 1M tokens — the maximum prompt plus response length it can handle in a single request.
Is Claude Sonnet 5 (Free) open weight?
No — Claude Sonnet 5 (Free) is a closed/proprietary model accessed via API.
Data as of 2026-10-15. Source: models.dev (open). Pricing is per 1M tokens (USD); confirm with the provider before production use.