Anthropic LLMs

Claude Sonnet 5 is the mid-tier model in the Claude 5 family and the default choice for most professional work. Anthropic made its launch pricing of $2 and $10 per million tokens permanent, which makes it one of the best price-to-quality options in the lineup.

Claude Sonnet 4.6 is the previous mid-tier Claude model, priced at $3 and $15 per million tokens. Sonnet 5 now costs less and is the better choice for new work, but 4.6 remains available for teams that need its established behavior.

Claude Opus 5.5, released on 22 September 2026, is Anthropic's newest Opus model. Anthropic reports it performs at the level of Claude Fable 5.1 on most work while costing about 40% less to run than Opus 5, with a focus on agentic coding, computer use and know

Claude Opus 5, released in July 2026, was Anthropic's flagship for demanding reasoning, coding and agentic work until Claude Opus 5.5 arrived in September at a lower price. It remains a capable, widely deployed model with a 1M-token context window.

Claude Opus 4.8 was Anthropic's flagship before Opus 5 and 5.5. It is still available at $5 and $25 per million tokens and supports fast mode, but new projects will usually get better value from the newer Opus models.

Claude Opus 4.7 is an earlier Opus release, priced at $5 and $25 per million tokens. It introduced the newer tokenizer used by later Claude models and remains available, though newer Opus models are the better starting point.

Claude Haiku 4.5 is Anthropic's fast, low-cost model at $1 and $5 per million tokens. It suits high-volume tasks such as classification, extraction and short drafting, where response speed and cost matter more than deep reasoning.

Claude Fable 5.1 is Anthropic's premium generally available model, priced above Opus and built for the hardest reasoning, coding and analysis tasks. Anthropic says the cheaper Opus 5.5 now matches it on most work, so Fable 5.1 makes most sense where the last f

Claude Fable 5 is a premium-tier Claude model priced above Opus, aimed at the hardest professional and technical work. It has been followed by Claude Fable 5.1, which is the version most teams should evaluate today.

Anthropic's assistant, known for long-context reasoning, careful writing, and safety-aware outputs. Strong on analysis, coding, and document-heavy work.