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Text modelsAnthropic

Claude Sonnet 4.5: model and API overview

Claude Sonnet 4.5 is part of Anthropic's Claude family. This card is for a text workflow. It can handle coding, code analysis, and agentic development tasks. Consider it when you need repository work, code repair, or a multi-step engineering task. Input: Text, Images; output: Text.

External model reference page. This page does not confirm availability in Neiron.

Capabilities

Claude Sonnet 4.5: For text workflows, it can handle coding, code analysis, and agentic development tasks.

Input: Text, Images; output: Text.

Purpose: Language model; developer: Anthropic; region: United States.

Use cases

Choose it for a text workflow: Claude Sonnet 4.5, when you need repository work, code repair, or a multi-step engineering task.Compare Claude Sonnet 4.5 with related Claude models if the task allows a different input or output format.Before starting, confirm the input format and expected result (text, code, or an implementation plan).

Reviewed facts

Developer
Anthropic
Purpose
Language model, Reasoning, Coding
Input
Text, Images
Output
Text
Geography
United States
Verified
2026-08-26

Benchmarks

No comparable benchmark is recorded in this card.

Sources

What to verify before use

Parameters, limits, licensing terms, and, where applicable, pricing for Claude Sonnet 4.5 change over time. Check the official Anthropic documentation before integrating.
Expected result: text, code, or an implementation plan. For a different input or output, see neighboring Claude cards.
For comparison, give models the same context and instructions; check factual accuracy, format compliance, and reasoning quality on your task.

FAQ

What is Claude Sonnet 4.5?

Claude Sonnet 4.5 is part of Anthropic's Claude family. This card is for a text workflow. It can handle coding, code analysis, and agentic development tasks. Consider it when you need repository work, code repair, or a multi-step engineering task. Input: Text, Images; output: Text.

What task is Claude Sonnet 4.5 suited to?

Handle coding, code analysis, and agentic development tasks. Choose it when you need repository work, code repair, or a multi-step engineering task.

What does Claude Sonnet 4.5 accept and return?

Reviewed input modalities: Text, Images. Output: Text. The record was checked on 2026-08-26.