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Documentation Index

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Claude is a family of state-of-the-art large language models developed by Anthropic.

Using the API

Use Chat completion API to call Claude models. See the pricing page for pricing details.

Claude models comparison from Anthropic

FeatureClaude Opus 4.6Claude Sonnet 4.6Claude Haiku 4.5Claude 4 SonnetClaude 4 OpusClaude 3.7 SonnetClaude 3.5 SonnetClaude 3.5 Haiku
DescriptionAnthropic’s latest flagship modelHigh-performance flagship for real-time applicationsNext-generation fast-response modelMost advanced Claude modelHighly capable for complex tasksEnhanced Claude 3.5 SonnetVersatile and intelligentFast and efficient
StrengthsAgentic planning, coding, complex reasoningMultimodal understanding, fast reasoning, cost-effectivenessLightning-fast inference, high performanceTop-level intelligence and reasoningExceptional fluency and understandingImproved performance and efficiencyBalanced performanceQuick and accurate
MultilingualYesYesYesYesYesYesYesYes
VisionYesYesYesYesYesNoNoNo
Tool callsYesYesYesYesYesYesYesYes
API model
name
claude-opus-4-6claude-sonnet-4-6claude-haiku-4-5claude-sonnet-4-20250514
claude-sonnet-4-20250514-thinking
claude-opus-4-20250514
claude-opus-4-20250514-thinking
claude-3-7-sonnet-latest
claude-3-7-sonnet-20250219
claude-3-5-sonnet-20241022
claude-3-5-sonnet-20240620
claude-3-5-sonnet-latest
claude-3-5-haiku-20241022
claude-3-5-haiku-latest
Comparative
latency
FastFastFastestFastestFastFastModerately fastFastest
Context
window
1M1M200K200K200K200K200K200K
Max output128K tokens128K tokens64K tokens8192 tokens4096 tokens8192 tokens8192 tokens8192 tokens
Training data
cut-off
Aug 2025Aug 2025Jul 2025May 2025May 2025June 2024June 2024June 2024

Official documentations