Anthropic
Anthropic is an AI safety and research company founded by former OpenAI researchers, specializing in Claude-family models. Claude 3.5 Sonnet delivers exceptional agentic coding capability and multi-step reasoning through their Constitutional AI framework. Anthropic prioritizes safety alignment and interpretability research, making their models particularly suited for enterprise deployment where safety guarantees are paramount.
Why Choose Anthropic?
Claude 3.5 Sonnet uses a dense transformer architecture with a novel loss function designed to minimize harmful completions during pre-training. The Constitutional AI pipeline applies a set of principles — harmlessness, honesty, and harmlessness — as gradient-level regularizers rather than post-hoc filtering. Their extended context window of 200K tokens is achieved through a Ring Attention implementation that distributes the KV-cache across multiple devices. Claude 3.5 Sonnet's agentic coding capabilities stem from a fine-tuning dataset of 100,000+ multi-step software engineering tasks with verified execution traces. They also support model context protocol (MCP) for structured tool integration, differentiating them from competitors who require custom API wrappers.
Pricing Overview
Claude 3.5 Sonnet is priced at $3.00/$15.00 per million input/output tokens. A limited $5 trial credit is available without a credit card, but continued usage requires payment information. Enterprise plans offer custom throughput and dedicated endpoint isolation. Anthropic's API includes beta features like extended thinking and tool use that are priced at the same token rate as standard completions.
Official Model Portfolio (3)
| MODEL | CONTEXT | INPUT $/1M | OUTPUT $/1M | SPEED | FREE |
|---|---|---|---|---|---|
| Claude 3.5 Sonnet | 200K | $3.00 | $15.00 | 80 tok/s | — |
| Claude 3.5 Haiku | 200K | $0.80 | $4.00 | 120 tok/s | — |
| Claude 3 Opus | 200K | $15.00 | $75.00 | 30 tok/s | — |