Available models
Different Claude generations use different structured-output paths under the hood.
Sonnet 5.0 and Opus 4.7 / 4.8 use the forced-tool-use path (schema conformance is
enforced by client-side validation and these models do not accept
temperature or
top_p); all other models use native structured output. See
Structured Output for the differences.Anthropic Claude models
Claude models excel at analysis, summarization, and following detailed instructions.Claude Haiku 4.5
Model ID:anthropic.claude-haiku-4.5
The fastest Claude model, optimized for high-throughput tasks where speed matters more than deep analysis.
Best for:
- Simple classification tasks
- Data extraction
- Quick summaries
- High-volume processing
Claude Sonnet 4.5
Model ID:anthropic.claude-sonnet-4.5
A balanced model offering strong performance across most tasks with good efficiency.
Best for:
- Content analysis
- Code generation
- Multi-step reasoning
- General-purpose tasks
Claude Sonnet 4.6
Model ID:anthropic.claude-sonnet-4.6
A Sonnet generation with improved reasoning and instruction following.
Best for:
- Content analysis
- Code generation
- Multi-step reasoning
- General-purpose tasks
Claude Sonnet 5.0
Model ID:anthropic.claude-sonnet-5.0
The latest Sonnet generation. Uses the forced-tool-use structured-output path — the
platform enforces output_format_schema conformance with client-side validation instead
of native grammar constraints. This model does not accept temperature or top_p;
those sampling parameters are silently dropped from your request.
Best for:
- Content analysis
- Code generation
- Multi-step reasoning where the newest Sonnet capabilities are preferred
Claude Opus 4.5
Model ID:anthropic.claude-opus-4.5
A highly capable Claude model for complex tasks requiring deep analysis and nuanced understanding.
Best for:
- Complex reasoning chains
- Nuanced analysis
- Research tasks
- High-stakes decisions
Claude Opus 4.6
Model ID:anthropic.claude-opus-4.6
An Opus generation with strong capabilities for demanding inference workloads.
Best for:
- Complex reasoning chains
- Nuanced analysis
- Research tasks
- High-stakes decisions
Claude Opus 4.7
Model ID:anthropic.claude-opus-4.7
A newer Opus generation for the most demanding inference workloads. Uses the
forced-tool-use structured-output path — the platform enforces output_format_schema
conformance with client-side validation. This model does not accept temperature or
top_p; those sampling parameters are silently dropped from your request.
Best for:
- Complex reasoning chains
- Nuanced analysis
- Research tasks
Claude Opus 4.8
Model ID:anthropic.claude-opus-4.8
The latest Opus generation, the most capable Claude model available. Uses the
forced-tool-use structured-output path with client-side schema validation, and
does not accept temperature or top_p.
Best for:
- Complex reasoning chains where the latest capabilities are preferred
- Nuanced analysis
- Research tasks
- High-stakes decisions
OpenAI models
OpenAI models offer strong reasoning capabilities and broad knowledge.GPT-4.1
Model ID:openai.gpt-4.1
Advanced reasoning model with strong analytical capabilities.
Best for:
- Complex analysis
- Technical reasoning
- Multi-domain tasks
o4-mini
Model ID:openai.o4-mini
Smaller, faster model optimized for efficiency.
Best for:
- Quick responses
- Simple tasks
- Cost-sensitive applications
GPT-oss-120b
Model ID:openai.gpt-oss-120b
Open-source large language model with broad capabilities.
Best for:
- General-purpose tasks
- Open-source requirements
Choosing a model
For detailed guidance on model selection, see Choosing the Right Model.
Usage example
Related content
Choosing Models
Detailed model selection guide
Running Inference
Submit inference requests
Model Inference API
Complete API reference
Model Inference Overview
How inference works

