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Models/Anthropic

Claude Sonnet 4.5

Balanced Claude model for coding, analysis, agent workflows, and cost control

Source-linked claude-sonnet Closed weights Released 2025-09-29
API data Report
Input modalitiesT
Output modalitiesT
Input price$3/1M tokens
Output price$15/1M tokens
Context window200K
Max output64K
Overview

Capabilities and specifications

✓ Reasoning Yes
✓ Tool calling Yes
? Structured output Unknown
✓ Attachments Yes
✓ Vision input Yes
× Open weights No
Creator
Anthropic
Model family
claude-sonnet
Knowledge cutoff
2025-07-31
License
Not documented
Release date
2025-09-29
Model ID
anthropic/claude-sonnet-4-5-20250929
Inference availability

Provider pricing and availability

Provider-specific identifiers, limits, and prices per million tokens.

Report a price
Providers offering Claude Sonnet 4.5
ProviderProvider model IDContextInputOutputCache readCapabilitiesSource
QiHang claude-sonnet-4-5-20250929 200K $0.43 $2.14 - ReasoningTools Docs
Vercel AI Gateway anthropic/claude-sonnet-4.5 1M $3 $15 $0.3 ReasoningToolsJSON Docs
DigitalOcean anthropic-claude-4.5-sonnet 1M $3 $15 $0.3 ReasoningTools Docs
Merge Gateway anthropic/claude-sonnet-4-5-20250929 200K $3 $15 $0.3 ReasoningToolsJSON Docs
LLM Gateway claude-sonnet-4-5-20250929 200K $3 $15 $0.3 ReasoningTools Docs
Abacus claude-sonnet-4-5-20250929 200K $3 $15 - ReasoningTools Docs
Vertex (Anthropic) claude-sonnet-4-5@20250929 200K $3 $15 $0.3 ReasoningTools Docs
Azure claude-sonnet-4-5 200K $3 $15 $0.3 ReasoningToolsJSON Docs
Anthropic claude-sonnet-4-5-20250929 1M $3 $15 $0.3 ReasoningToolsJSON Docs
OpenCode Zen claude-sonnet-4-5 1M $3 $15 $0.3 ReasoningTools Docs
Amazon Bedrock anthropic.claude-sonnet-4-5-20250929-v1:0 200K $3 $15 $0.3 ReasoningToolsJSON Docs
Databricks databricks-claude-sonnet-4 200K $3 $15 $0.3 ReasoningTools Docs
Azure Cognitive Services claude-sonnet-4-5 200K $3 $15 $0.3 ReasoningToolsJSON Docs
Vertex claude-sonnet-4-5@20250929 200K $3 $15 $0.3 ReasoningTools Docs
Neon claude-sonnet-4 200K $3 $15 $0.3 ReasoningTools Docs
Venice AI claude-sonnet-4-5 198K $3.75 $18.75 $0.375 ReasoningToolsJSON Docs

Capability badges appear only when the provider catalog explicitly lists support.

Serving quality

Performance and reliability

Observed serving measurements stay separate from model specifications and are never estimated from price or model size.

Throughput Not reported

Generation speed; higher is faster.

Latency / TTFT Not reported

Time until the first output token arrives.

Uptime Not reported

Successful requests over a measured period.

Performance varies by inference provider, region, and load. Provider-level measurements appear only when a source reports them.

Published evaluations

Benchmarks

Raw results remain attached to their original source and version.

Benchmark registry
No comparable benchmark results

ModelBench does not infer quality from price, context size, or model name.

Read the methodology
Catalog activity

Recent record changes

Detected changes from successful source imports.

Full change log
No recent changes detected

This record has not changed in the retained import history.

Public API

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Fetch the complete source-linked model record without an API key.

API documentation
Endpoint
GET https://www.modelbench.lol/api/v1/models/anthropic/claude-sonnet-4-5-20250929
curl
curl "https://www.modelbench.lol/api/v1/models/anthropic/claude-sonnet-4-5-20250929"