Claude Sonnet 4.5 is an AI model from Anthropic. Claude Sonnet 4.5 with extended thinking mode enabled for enhanced step-by-step reasoning on complex tasks.
Specifications
Canonical IDanthropic-claude-4-5-sonnet-thinking
StatusActive
CreatorAnthropicAnthropic
Benchmarks
Intelligence Index
43.0
#48
Coding Index
38.6
#47
Math Index
88.0
#36
MMLU-Pro
0.9
#8
GPQA
0.8
#66
HLE
0.2
#75
LiveCodeBench
0.7
#56
IFBench
0.6
#106
Time to First Token
7.99s
#439
SciCode
0.4
#37
AIME 2025
0.9
#36
LCR
0.7
#49
TerminalBench Hard
0.4
#46
TAU2
0.8
#106
Output TPS
46.1
#219

Capabilities

Input0/5
Text·
Image·
Audio·
Video·
PDF·
Output0/5
Text·
Image·
Audio·
Video·
Embedding·
Capabilities0/13
Reasoning·
Adaptive Reasoning·
Function Calling·
Parallel Function Calling·
Structured Outputs·
Native JSON Schema·
Web Search·
URL Context·
Computer Use·
Code Execution·
File Search·
Prompt Caching·
Assistant Prefill·

Versions

VersionReleasedContextInput / 1MOutput / 1MStatus
Claude Sonnet 4.61.0M$3.00$15.00Available
Claude Sonnet 4.51.0M$3.00$15.00Available
Claude Sonnet 41.0M$3.00$15.00Deprecated
Claude Sonnet 4.5Current
Claude Sonnet 4.6 AdaptiveAvailable
Claude Sonnet 4.6 Non-Reasoning Low EffortAvailable
Claude Sonnet 4Available
Claude Sonnet 4.1200K$3.00$15.00Available
Claude Sonnet 3.7200KAvailable
Claude Sonnet 3.7200K$3.00$15.00Deprecated
Claude Sonnet 3.5 V2200K$3.00$15.00Deprecating

Other models

ModelTierReleasedContextInput / 1MOutput / 1M
Claude Opus 4.7 FastOpus1.0M$30.00$150.00
Claude Opus 4.7Opus1.0M$5.00$25.00
Claude Opus 4.6Opus1.0M$5.00$25.00
Claude Opus 4.5Opus410K$5.00$25.00
Claude Haiku 4.5Haiku200K$1.00$5.00
Claude Opus 4.1Opus200K$15.00$75.00
Claude Opus 4Opus410K$15.00$75.00
Claude Opus 4.6 AdaptiveOpus
Claude Opus 4.5Opus
Claude Opus 4.1Opus

Model IDs