Anthropicclaude-sonnet-4.5-20250929
anthropic/claude-sonnet-4.5-20250929
featuredcodingagentsreasoning
Anthropic's balanced Claude 4.5 model: strong at coding, long-running agents and computer use, with vision input, a 200K context window and up to 64K output tokens. Released 2025-09-29.
Pricing
USD per 1M tokens, billed per token. Cached input applies where the provider caches prompts.
- Input
- $3.00
- Output
- $15.00
- Cached input
- $0.300
Specifications
- Context length
- 200K
- Max output tokens
- 64,000
- Input
- text, image
- Output
- text
- Endpoints
- anthropic, openai
- Released
- Sep 29, 2025
- Alias accepted
- claude-sonnet-4.5-20250929
Example request
curl https://api.nxioai.com/api/v1/chat/completions \
-H "Authorization: Bearer $NXIO_API_KEY" \
-H "Content-Type: application/json" \
-d '{"model":"anthropic/claude-sonnet-4.5-20250929","messages":[{"role":"user","content":"Hello"}]}'Price history
Every price change opens a new version. Past requests are billed with the version in effect at the time.
| Effective | Until | Input | Output | Cached input | Source |
|---|---|---|---|---|---|
| Oct 6, 2026 | current | $3.00 | $15.00 | $0.300 | sync |