Activefrontierllm Proprietary

Claude Sonnet 4.0

by Anthropic· Released May 2024· Cutoff April 2024

Claude Sonnet 4.0 is Anthropic's mid-tier model balancing performance and cost, offering strong reasoning, coding, and multilingual capabilities. It is designed for high-throughput enterprise applications requiring reliable, safe AI interactions. Sonnet 4.0 sits between the faster Haiku and the more powerful Opus in the Claude 4 family.

Official Site API Docs

Input cost

$3.00 per 1M tokens

Output cost

$15.00 per 1M tokens

Context window

200K tokens

Max output

8192 tokens

Modalities

textimage

License

proprietary

Capabilities

Function CallingCode GenerationStreamingJSON ModeMultilingualVision (image input)Tool UseExtended Thinking

Best For

Enterprise applications needing a balance of intelligence, speed, and cost for tasks like coding, analysis, and customer support.

Strengths

Strong coding and reasoning performance
Large 200K token context window
Cost-effective for its capability tier
Reliable and safe outputs with constitutional AI
Multilingual support across many languages

Limitations

Not as powerful as Opus for complex reasoning
Slower than Haiku for simple tasks
No native image generation
Limited to text and image inputs (no audio/video)
Pricing higher than some competitors for high-volume use

Use Cases

Code generation and debugging

Document analysis and summarization

Customer support chatbots

Data extraction and structuring

Content creation and editing

Multilingual translation and localization

Research assistance and report generation

Improvements Over Previous Model

Context window increased from 100K to 200K tokens
Improved coding performance (HumanEval score ~90% vs ~85% in Sonnet 3.5)
Lower pricing: $3/M input tokens vs $8/M in Sonnet 3.5
Added vision/image input support
Faster inference with lower latency
Enhanced multilingual capabilities

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