LLM Models

February 2026 Opus release that added a 1M-token context window at standard pricing and adaptive thinking. The first Opus with the dateless pinned-snapshot model ID format. Superseded by Opus 4.7.

November 2025 Opus release that dramatically cut flagship pricing (from $15/$75 to $5/$25) while improving agentic coding and reasoning. Superseded by Opus 4.6 and 4.7.

Anthropic's fastest model with near-frontier intelligence (October 2025). Supports extended thinking and delivers strong coding and agentic performance at the lowest Claude pricing tier.

September 2025 upgrade to the Sonnet line with stronger coding and agentic performance and a 1M-token context window (beta). The balanced choice for most production workloads.

DISCONTINUED. An August 2025 incremental upgrade to Claude Opus 4 with improved agentic and coding performance. Anthropic has deprecated the model and retires it on August 5, 2026; Claude Opus 5 is the documented migration target. Superseded on price and capability by the Opus 4.5 generation onward.

DISCONTINUED. The balanced workhorse of Anthropic's first Claude 4 generation (May 2025), pairing strong intelligence with fast, cost-effective inference. Deprecated and scheduled for retirement on June 15, 2026 in favor of Claude Sonnet 4.6. Anthropic retired it on June 15, 2026; all requests to claude-sonnet-4-20250514 on the Claude API now return an error.

DISCONTINUED. The flagship of Anthropic's first Claude 4 generation (May 2025), built for complex reasoning and long-horizon agentic coding. Deprecated and scheduled for retirement on June 15, 2026 in favor of Claude Opus 4.7. Anthropic retired it on June 15, 2026; all requests to claude-opus-4-20250514 on the Claude API now return an error.

DISCONTINUED. Anthropic's first hybrid reasoning model, combining quick responses with optional extended thinking in a single model. Strong gains in coding and agentic tasks, and introduced configurable thinking budgets. Superseded by the Claude 4 family. Anthropic retired it on February 19, 2026; all requests to claude-3-7-sonnet-20250219 now return an error.

DISCONTINUED. Anthropic's mid-2024 flagship Sonnet model and the first to introduce computer use (beta). Strong coding and agentic performance at a fraction of Opus pricing. The October 2024 revision improved tool use and agentic coding. Superseded by the Claude 4 family. Anthropic retired the Claude Sonnet 3.5 models on October 28, 2025; all requests now return an error.

DISCONTINUED. Anthropic's fastest model that matches Claude 3 Opus performance at similar speed to previous-gen Haiku. Released October 2024 with July 2024 training cutoff. Achieves 40.6% on SWE-bench Verified, outperforming agents using Claude 3.5 Sonnet and GPT-4o. Features 200K context window and 8K max output. Surpasses Claude 3 Opus on intelligence benchmarks while maintaining Haiku-class speed. Pricing: $0.80 per 1M input, $4 per 1M output (revised Dec 2024). Supports prompt caching (90% savings) and Message Batches API (50% savings). Anthropic retired it on the Claude API on February 19, 2026; requests now return an error, though it remains available on Amazon Bedrock and Google Cloud.

DISCONTINUED. Anthropic's fastest and most affordable model in its intelligence class. Processes 21K tokens (~30 pages) per second for prompts under 32K tokens, making it 3x faster than peers. Features 200K context window, vision capabilities, and surprisingly strong performance - during testing, surpassed the previous flagship Claude 3 Opus on many benchmarks. Exceptional value proposition: can process 400 Supreme Court cases or 2,500 images for just $1. State-of-the-art speed-to-intelligence ratio. Anthropic retired it on April 20, 2026; all requests to claude-3-haiku-20240307 now return an error.

DISCONTINUED. Anthropic's most capable model in the Claude 3 family, setting new standards for AI performance. Outperforms peers on most common evaluation benchmarks including graduate-level reasoning (GPQA), undergraduate knowledge (MMLU), and basic math (GSM8K). Achieved near-perfect 99% accuracy on 'Needle in a Haystack' recall evaluation. Features sophisticated vision capabilities for analyzing photos, charts, and technical diagrams. 200K context window expandable to 1M for specific use cases. Note: Deprecated as of January 2026, scheduled for retirement January 5, 2026 - migrate to Claude Opus 4.1. Anthropic retired it on January 5, 2026; requests now return an error.