Claude Opus 5 (Fast)
Anthropic
Claude Opus 5 is the latest model in Anthropic's Opus family and a step-change improvement over Opus 4.8. It delivers major gains over Opus 4.8 in agentic coding, professional knowledge work, and long-horizon reasoning, and it is stronger per token across effort levels.
- Language
- Tool use
- Reasoning
- Vision
- File input
- Explicit caching
- Web search
- Fast
- Context
- 1M
- Max output
- 128K
- Input / 1M
- $10.00
- Output / 1M
- $50.00
Quickstart
Point any OpenAI-compatible client at Maxynetic Systems and pass anthropic/claude-opus-5-fast as the model.
curl https://api.maxynetic.com/v1/chat/completions \
-H "Authorization: Bearer $MAXYNETIC_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "anthropic/claude-opus-5-fast",
"messages": [{ "role": "user", "content": "Explain routing in one line." }]
}'Pricing
Billed per token with no markup on the underlying provider rate.
Input
Per 1M prompt tokens
$10.00
Output
Per 1M completion tokens
$50.00
Cache read
Per 1M cached prompt tokens
$1.00
Cache write
Per 1M tokens written to cache
$12.50
A 1M-token prompt with 250K tokens of output costs about $22.50.