Anthropic
Claude Sonnet 4.5 20250929
Claude Sonnet 4.5 20250929 is an Anthropic model with vision, function calling, web search, extended reasoning, prompt caching, and structured output capabilities. It is priced at $3 per million input tokens and $15 per million output tokens, and has a 200K token context window. Access the Claude Sonnet 4.5 20250929 API through Inworld Router or Realtime API.
→Function CallingWeb SearchReasoningPrompt CachingResponse SchemaVision
curl --location 'https://api.inworld.ai/router/v1/routers' \
--header 'Content-Type: application/json' \
--header 'Authorization: Basic <your-api-key>' \
--data '{
"name": "compare-frontier-models",
"default_route": {
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"variants": [
{
"variant": { "variant_id": "anthropic",
"model_id": "anthropic/claude-sonnet-4-5-20250929" },
"weight": 33
},
{
"variant": {
"variant_id": "anthropic",
"model_id": "anthropic/claude-3-haiku-20240307"
},
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},
{
"variant": {
"variant_id": "anthropic",
"model_id": "anthropic/claude-haiku-4-5-20251001"
},
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]
}
}'Inference providers
Access Claude Sonnet 4.5 20250929 through Anthropic via Inworld Router or Realtime API.
| Capabilities | Input modalities | Output modalities | |||||
|---|---|---|---|---|---|---|---|
| Anthropic | 200K | 64K | $3.00 | $15.00 | +3 |
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| Claude Sonnet 4 20250514 | 1M | 64K | $3.00 | $15.00 | +2 | |||
| Claude Sonnet 4.6 | 200K | 64K | $3.00 | $15.00 | +2 |
Start building with Claude Sonnet 4.5 20250929
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