Friday, August 21, 2026 · No. 390Prices synced 3 hours ago
All·AI·Model

The AI Model Price Index

Claude Sonnet 4.5 (20250929)

by Merge Gateway · 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$2.00Claude Sonnet 4.5 (20250929)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$7.50Claude Sonnet 4.5 (20250929)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
anthropic/claude-sonnet-4-5-20250929
Context window
200K tokens
Max output
64K tokens
Input modalities
text, image, pdf
Output modalities
text
Reasoning
yes
Tool calls
yes
Open weights
no
Knowledge cutoff
Jul 2025
Released
2025-09-29
Last updated
2025-09-29
Provider docs
docs.merge.dev/merge-gateway

Back of the envelope

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