Model introduction
Claude Sonnet 4.5 is the balanced Claude 4.5 model for enterprise retrieval, coding, data analysis, and scaled agent work.
Model capabilities
Specifications come from the cited model material. Catalog tags help identify access features; use the source documentation for exact limits.
Verified specifications
- Official positioning
- Balanced Claude 4.5 enterprise model
- Context window
- Up to 1,000,000 tokens
- Maximum output
- 64,000 tokens
- Input / output
- Text, image, PDF / Text
Sources: B.AI Claude Sonnet 4.5 model guide
Model pricing and access
Prices are read directly from the MoleAPI console catalog and shown by current billing group and context tier.
Your final charge follows the account group shown in the console.
Live pricing source
Pricing table
USD / 1M tokensStandardx1defaultInput $3 · Output $15
Input
$3 / 1M tokens
Output
$15 / 1M tokens
Cache read
$0.3 / 1M tokens
Discountx0.8discountInput $2.4 · Output $12
Input
$2.4 / 1M tokens
Output
$12 / 1M tokens
Cache read
$0.24 / 1M tokens
Relayx0.3relayInput $0.9 · Output $4.5
Input
$0.9 / 1M tokens
Output
$4.5 / 1M tokens
Cache read
$0.09 / 1M tokens
Access protocols
Available billing groups: Standard, Discount, Relay
- anthropic
- POST
- /v1/messages
- openai
- POST
- /v1/chat/completions
About claude-sonnet-4-5-20250929
This introduction is transcreated for clarity and cross-checked against the cited model material.
Claude Sonnet 4.5 is the balanced Claude 4.5 model for enterprise retrieval, coding, data analysis, and scaled agent work.
Core strengths
- Balances intelligence, speed, and price for scaled deployment.
- Supports long context, images, PDFs, extended thinking, and tools.
- Mature behavior fits projects that need a pinned older model.
Limitations
- Sonnet 4.6 offers stronger capability and token efficiency at the same tier.
- Long context and extended thinking still need explicit budgets.
Selection and production evaluation
Start a claude-sonnet-4-5-20250929 evaluation by mapping its official positioning to real work: Enterprise knowledge bases, sales and operations automation, coding assistance, long-document analysis, and multi-step tool workflows. The first pass should exercise both its main strength, "Balances intelligence, speed, and price for scaled deployment.", and its known limitation, "Sonnet 4.6 offers stronger capability and token efficiency at the same tier.", instead of relying on a single subjective general-chat comparison.
For access, MoleAPI currently lists anthropic, openai protocols and the Standard, Discount, Relay billing groups for this Anthropic model; the default price summary is Input $3 / 1M tokens · Output $15 / 1M tokens. Pricing, protocols, and groups come from the live catalog, so production planning should still price representative requests using real context length, output size, and cache-hit assumptions.
No independent ranking is shown unless it matches this exact model ID and reasoning profile, so nearby variants are not used as a proxy. Before launch, pin the model ID, prompt, and sample set, then compare task accuracy, structured-output validity, tool-call success, and timeout rates under the same conditions.
The model material on this page was last checked on 2026-07-24. When upstream model cards, context limits, or tool support change, update the cited bilingual facts before changing the recommendation; live MoleAPI price changes remain separate and update from the catalog automatically.
Code examples
These examples use MoleAPI's OpenAI-compatible endpoint and run after you replace the API key.
curl https://api.moleapi.com/v1/chat/completions \
-H "Authorization: Bearer $MOLEAPI_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "claude-sonnet-4-5-20250929",
"messages": [{"role": "user", "content": "Hello"}]
}'Frequently asked questions
How is claude-sonnet-4-5-20250929 priced?
This page reads prices from the MoleAPI console API and updates with model prices, context tiers, and account groups.
How can I access claude-sonnet-4-5-20250929?
Protocols and endpoints come from the supported_endpoint_types field in the MoleAPI model catalog.
How do I switch an existing project to claude-sonnet-4-5-20250929?
Keep the MoleAPI API address and key, replace the model parameter with the model ID on this page, then check protocol-specific parameter differences.
Where do the claude-sonnet-4-5-20250929 model details come from?
Capabilities and limitations are checked against B.AI and the other cited pages. Pricing and available protocols come only from the MoleAPI console.