Claude 3.5 Sonnet vs Claude Sonnet 4

Compare Anthropic and Anthropic AI models

Anthropic

Claude 3.5 Sonnet

Anthropic

Claude Sonnet 4

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Cost Comparison (1000 input + 500 output tokens, 100 requests/day)

Claude 3.5 Sonnet

Per Request:$0.0105

Daily:$1.05

Monthly:$31.50

Yearly:$383.25

Claude Sonnet 4

Per Request:$0.0105

Daily:$1.05

Monthly:$31.50

Yearly:$383.25

Cost Differences

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Claude Sonnet 4 costs less than Claude 3.5 Sonnet

Feature Comparison

Feature	Claude 3.5 Sonnet	Claude Sonnet 4
Provider	Anthropic	Anthropic
Input Price	$3.00/1M tokens	$3.00/1M tokens
Output Price	$15.00/1M tokens	$15.00/1M tokens
Context Window	200,000 tokens	200,000 tokens
Max Output	8,192 tokens	64,000 tokens
Category	balanced	standard
Capabilities	textvisioncode	textvisioncodereasoning
Release Date	10/22/2024	5/14/2025

Claude 3.5 Sonnet vs Claude Sonnet 4: Which Should You Choose?

Choosing between Claude 3.5 Sonnet and Claude Sonnet 4 depends on your priorities: cost efficiency, context length, or raw capability. Claude Sonnet 4 is the more affordable option at $3.00/1M input tokens.

These models target different tiers: Claude 3.5 Sonnet is a balanced model while Claude Sonnet 4 is standard. This means they're optimized for different workloads. Claude Sonnet 4 targets more demanding workloads, while Claude 3.5 Sonnet provides a cost-effective option for everyday tasks.

Output costs matter too. Claude 3.5 Sonnet charges $15.00/1M output tokens vs $15.00 for Claude Sonnet 4.

Multimodal capabilities: Both models support vision (image understanding), so you can send images alongside text prompts with either option.

Best Use Cases

Choose Claude 3.5 Sonnet when:

• You're already using Anthropic's API ecosystem

Choose Claude Sonnet 4 when:

• You need more capabilities (reasoning)
• You need longer outputs (up to 64,000 tokens)
• You're already using Anthropic's API ecosystem

Try Different Scenarios

Use the calculator below to see how costs change with different usage patterns

Claude 3.5 Sonnet (Anthropic)

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Claude Sonnet 4 (Anthropic)

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Frequently Asked Questions

Which is cheaper, Claude 3.5 Sonnet or Claude Sonnet 4?▼

Claude Sonnet 4 is cheaper for input tokens at $3.00 per million tokens vs $3.00 for Claude 3.5 Sonnet.

What is the context window difference between Claude 3.5 Sonnet and Claude Sonnet 4?▼

Claude 3.5 Sonnet supports 200,000 tokens while Claude Sonnet 4 supports 200,000 tokens — a difference of 0 tokens in favor of Claude 3.5 Sonnet.

Which model is better for AI Chatbot?▼

Both models support text. For ai chatbot, Claude Sonnet 4 is the lower-cost option, while Claude 3.5 Sonnet offers a larger context window (200,000 vs 200,000 tokens). Choose Claude Sonnet 4 for budget sensitivity or Claude 3.5 Sonnet for longer context tasks.

Which model has better overall pricing for heavy usage?▼

At 100 requests/day with 1,000 input and 500 output tokens each, Claude 3.5 Sonnet costs about $31.50/month and Claude Sonnet 4 costs about $31.50/month. Overall, Claude Sonnet 4 has lower combined input + output rates ($3.00 in, $15.00 out) vs Claude 3.5 Sonnet.