Tuesday, July 7, 2026 · No. 345Prices synced 1 hour ago
All·AI·Model

The AI Model Price Index

Anthropic: Claude Sonnet 4.5 (20250929)

by Helicone · family claude-sonnet · listed Sep 2025RTV

Balanced Claude model for coding, analysis, agent workflows, and cost control

Current rates USD per 1M tokens

Input$3.00
Output$15.00
Cache read$0.30
Cache write$3.75

Against the market

Input price vs. maker flagships ($/1M tokens)
DeepSeek V4 FlashDeepSeek V4 Flash: $0.14 per 1M tokens$0.14Qwen3.7 PlusQwen3.7 Plus: $0.50 per 1M tokens$0.50Grok 4.3Grok 4.3: $1.25 per 1M tokens$1.25Gemini 3.5 FlashGemini 3.5 Flash: $1.50 per 1M tokens$1.50Mistral Medium (latest)Mistral Medium (latest): $1.50 per 1M tokens$1.50Claude Sonnet 5Claude Sonnet 5: $2.00 per 1M tokens$2.00Anthropic: Claude Sonnet 4.5 (20250929)Anthropic: Claude Sonnet 4.5 (20250929): $3.00 per 1M tokens$3.00GPT-5.5 ProGPT-5.5 Pro: $30.00 per 1M tokens$30.00
Output price vs. maker flagships ($/1M tokens)
DeepSeek V4 FlashDeepSeek V4 Flash: $0.28 per 1M tokens$0.28Grok 4.3Grok 4.3: $2.50 per 1M tokens$2.50Qwen3.7 PlusQwen3.7 Plus: $3.00 per 1M tokens$3.00Mistral Medium (latest)Mistral Medium (latest): $7.50 per 1M tokens$7.50Gemini 3.5 FlashGemini 3.5 Flash: $9.00 per 1M tokens$9.00Claude Sonnet 5Claude Sonnet 5: $10.00 per 1M tokens$10.00Anthropic: Claude Sonnet 4.5 (20250929)Anthropic: Claude Sonnet 4.5 (20250929): $15.00 per 1M tokens$15.00GPT-5.5 ProGPT-5.5 Pro: $180 per 1M tokens$180

On the record

Model id
claude-sonnet-4-5-20250929
Context window
200K tokens
Max output
64K tokens
Input modalities
text, image
Output modalities
text
Reasoning
yes
Tool calls
yes
Open weights
no
Knowledge cutoff
Sep 2025
Released
2025-09-29
Last updated
2025-09-29
Provider docs
helicone.ai/models

Back of the envelope

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