Friday, August 21, 2026 · No. 390Prices synced 3 hours 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 ProDeepSeek V4 Pro: $0.435 per 1M tokens$0.435Gemini 3.7 FlashGemini 3.7 Flash: $0.75 per 1M tokens$0.75Mistral Medium 3.5Mistral Medium 3.5: $1.50 per 1M tokens$1.50Grok 4.6Grok 4.6: $2.00 per 1M tokens$2.00Qwen3.8 MaxQwen3.8 Max: $2.00 per 1M tokens$2.00Anthropic: Claude Sonnet 4.5 (20250929)Anthropic: Claude Sonnet 4.5 (20250929): $3.00 per 1M tokens$3.00Claude Opus 5Claude Opus 5: $5.00 per 1M tokens$5.00GPT-5.6 SolGPT-5.6 Sol: $5.00 per 1M tokens$5.00
Output price vs. maker flagships ($/1M tokens)
DeepSeek V4 ProDeepSeek V4 Pro: $0.87 per 1M tokens$0.87Gemini 3.7 FlashGemini 3.7 Flash: $3.75 per 1M tokens$3.75Grok 4.6Grok 4.6: $6.00 per 1M tokens$6.00Qwen3.8 MaxQwen3.8 Max: $6.00 per 1M tokens$6.00Mistral Medium 3.5Mistral Medium 3.5: $7.50 per 1M tokens$7.50Anthropic: Claude Sonnet 4.5 (20250929)Anthropic: Claude Sonnet 4.5 (20250929): $15.00 per 1M tokens$15.00Claude Opus 5Claude Opus 5: $25.00 per 1M tokens$25.00GPT-5.6 SolGPT-5.6 Sol: $30.00 per 1M tokens$30.00

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

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