Azure Cognitive Services
Coverage
Claude Sonnet 4.6 brings improved coding performance, expanded developer tools, enhanced API capabilities, and updated safety evaluations.
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Model details
Claude Sonnet 4.5
Claude Sonnet 4.5 sits in Anthropic's Sonnet line as a general-purpose large language model aimed at demanding developer and reasoning workloads. Anthropic positioned the release as a step forward for agentic coding, computer use, and complex multi-step problem solving, with a third-party security report noting substantial gains in reasoning and mathematics compared with earlier Claude generations. The model is hosted in Azure Cognitive Services under Anthropic's Claude family, broadening enterprise access to the Claude lineup alongside Anthropic's own API surface and other cloud partners.
In practical terms, the model is shaped for sustained autonomous operation on long-running tasks, with a reported capability to drive agents through extended sessions that previous Sonnet versions could not sustain as reliably. It is designed to plug into modern application stacks through tool calling, structured output, and multimodal input handling, making it a fit for code generation pipelines, research assistants, and workflow automation where the model must orchestrate tools over many steps. A successor, Claude Sonnet 4.6, has since been announced with further coding and developer-tool improvements, signaling continued iteration on this product tier.
Azure Cognitive Servicesclaude-sonnet-4-5claude-sonnet
Quick Info
Powered by- Provider
- Azure Cognitive Services
- Model key
- claude-sonnet-4-5
- Release date
- Nov 18, 2025
- Last updated
- Nov 18, 2025
- Knowledge cutoff
- 2025-07-31
- AI SDK package
@ai-sdk/anthropic- Input modalities
- Output modalities
- Capabilities
Cost
- Input token cost
- $3.00
- Output token cost
- $15.00
Limits
- Output tokens
- 64,000 tokens
- Context window
- 200,000 tokens
Transparent token rates
Compare Claude Sonnet 4.5 pricing
Rates are shown per one million tokens. Combined means one million input plus one million output tokens.
Latest news about Claude Sonnet 4.5
Azure Cognitive Services
CoverageRelease Notes
Claude Sonnet 4.6, Anthropic's latest agentic coding model, is now rolling out in GitHub Copilot. In early testing, this model excels on agentic coding,...
Azure Cognitive Services
Coverage
Anthropic has announced the launch of Claude Sonnet 4.6, boasting significant performance and cost improvements.
Venice AI
CoverageBenchmark
CodeRabbit's benchmark evaluation compared Claude Sonnet 4.5 against Sonnet 4 and Opus 4.1 across 25 difficult real-world pull requests with known critical bugs. Sonnet 4.5 achieved 41.5% "Important" comments versus 35.3% for Sonnet 4, demonstrating measurable progress in catching bugs and surfacing critical issues inc The evaluation found Sonnet 4.5 approaches Opus 4.1's coverage and precision at a fraction of the price, making it a pragmatic sweet spot for code review at scale. However, the model showed more hedging and self-questioning behavior, sometimes sounding like "a thoughtful colleague rather than a decisive reviewer." This
Venice AI
CoverageBenchmark
Cirra AI's technical analysis confirms Claude Sonnet 4.5 was released September 29, 2025, with a 200,000-token context window and up to 64K output tokens. The model uses a hybrid reasoning architecture with an "extended thinking" mode for multi-step tasks, enabling more sophisticated agentic workflows. Anthropic positi New API-side tools shipped alongside Sonnet 4.5 include context editing, memory, checkpoints, and VS Code integration to support long-running agentic workflows. The model demonstrated autonomous operation spanning 30+ hours on complex tasks. These capabilities reflect Anthropic's focus on making Sonnet 4.5 suitable for