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Claudech models

Every Claudech model speaks the same API. Pick the one that fits the job and switch at any time by changing the model name.

Claude Sonnet 5

Fast and capable

Our balanced everyday model. Strong reasoning with quick responses, ideal for chat, coding and analysis.

StreamingReasoningVisionTool useJSON mode

Try in chat Open playground

Model ID: claude-sonnet-5
Context window: 256,000 tokens
Max output: 65,536 tokens
Input / 1M: $0.75
Cached input / 1M: $0.075
Output / 1M: $3.00
Availability: All plans
Released: Sep 2026

Claude Fable 5.1

Advanced reasoning

Our most capable model for complex, multi-step work where quality matters most.

StreamingReasoningVisionTool useJSON mode

Try in chat Open playground

Model ID: claude-fable-5-1
Context window: 256,000 tokens
Max output: 131,072 tokens
Input / 1M: $3.00
Cached input / 1M: $0.150
Output / 1M: $9.00
Availability: Paid plans
Released: Sep 2026

Claude Opus 5

Deep reasoning

Extended thinking for hard problems: mathematics, research synthesis and intricate debugging.

StreamingReasoningVisionTool useJSON mode

Try in chat Open playground

Model ID: claude-opus-5
Context window: 256,000 tokens
Max output: 131,072 tokens
Input / 1M: $0.90
Cached input / 1M: $0.090
Output / 1M: $3.60
Availability: All plans
Released: Sep 2026

Claude Haiku 4.5

Fast responses

Lowest latency and cost for high-volume tasks: classification, extraction, summaries and simple chat.

StreamingReasoningVisionTool useJSON mode

Try in chat Open playground

Model ID: claude-haiku-4-5
Context window: 128,000 tokens
Max output: 32,768 tokens
Input / 1M: $0.22
Cached input / 1M: $0.022
Output / 1M: $1.75
Availability: All plans
Released: Sep 2026