Claude has introduced Claude Haiku 5.5, describing it as its cheapest, fastest, and most capable small model to date. On average, the model costs around 75% less to run than Claude Haiku 4.5.
Pi tells users to run pi update --models alongside Claude’s introduction of Claude Sonnet 5.5. Claude says the model is the second in the Claude 5.5 family, runs more than 30% faster than Sonnet 5, and costs up to 30% less for most work.
The Jev-like classifier is finetuned on Qwen3.5 4B and priced at $0.042/M input and $0/M output. Together AI is also releasing a data recipe and a finetuning tutorial, and says training Tev1 cost $17.
Command Code has added 12 models, including Mimo V2.6 Pro Ultraspeed, GLM 5.3 FlashX, Qwen 3.8 Omni Flash, and Step 5 Preview. DeepSeek V4.1 Flash is included with extended usage, and Jev is free.
Claude says Opus 5.5 performs at the level of Claude Fable 5.1 for most tasks and costs 40% less to run than Opus 5. Pi says users who want it in Pi can wait or run pi update --models.
ClaudeDevs says Opus 5.5 is available in Claude Code and the Claude Platform, and is using it as the new daily driver for coding and agentic work, citing its intelligence, lower price, and speed.
Anthropic said on September 22, 2026, that Claude Opus 5.5 is available. Claude says it performs at the level of Claude Fable 5.1 for most tasks and costs 40% less to run than Opus 5.
Claude says Opus 5.5 performs at the level of Claude Fable 5.1 for most tasks and costs 40% less to run than Opus 5.
