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Model 1

Model 2

Anthropic: Claude Sonnet 4.5

anthropic

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Input Price

Cost per 1M input tokens

$3.00/M tokens

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Output Price

Cost per 1M output tokens

$15.00/M tokens

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Cache Read Price

Cost per 1M cached tokens

$0.00/M tokens

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Cache Write Price

Cost to write 1M tokens to cache

$0.00/M tokens

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Context Window

Maximum tokens the model can process

1,000,000 tokens

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Max Output Tokens

Maximum tokens in model response

64,000 tokens

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Input Modalities

Supported input types

text, image, file

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Output Modalities

Supported output types

text

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Coding Index

Overall coding capability score

49.8%

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LiveCodeBench

Real-world coding task performance

71.4%

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SciCode

Scientific computing & algorithms

44.7%

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TerminalBench Hard

CLI & terminal command generation

33.3%

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Long Context Reasoning

Understanding large codebases

65.7%

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IFBench

Instruction following accuracy

57.3%

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Output Speed

Median tokens per second

63.4 tok/s

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Function Calling

Can call external functions/APIs

✓ Supported

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Tool Choice

Control over function selection

✓ Supported

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Structured Outputs

JSON schema validation

✓ Supported

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Reasoning Tokens

Extended thinking for complex problems

✗ Not supported

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Content Moderation

Content filtering status

Disabled

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Model ID

anthropic/claude-sonnet-4.5

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Tokenizer

Claude

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Release Date

Sep 29, 2025

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Created On OpenRouter

Sep 29, 2025

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Kilo Code

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