Use Claude Instant 1.2 for faster, lower-cost AI tasks
Claude Instant 1.2 is a faster, lower-priced model for dialogue, summarization, and document comprehension.
Claude Instant 1.2
General AI tasks like dialogue, summarization, document comprehension, and coding.
Offers significant gains in math, coding, reasoning, and safety over 1.1, with longer, more structured responses and better formatting adherence.
2025-04-04
Claude Instant 1.2 is Anthropic's latest fast, low-cost AI model. It improves on its predecessor with better performance in math, coding, reasoning, and safety. It's suitable for a wide range of tasks including casual dialogue, text analysis, summarization, and document comprehension.
- Releasing Claude Instant 1.2 ↗Anthropic News · Anthropic News · Apr 4, 2025 · paraphrased
First seen on Subvolts Apr 4, 2025. Updated Sep 11, 2026. Spotted a problem? Tell us.
- Releasing Claude Instant 1.2Anthropic · Anthropic News · Apr 4, 2025
The Playbook: reusable how-tos, prompts, configs and tips pulled out of the news.
- HeuristicUse AI agents to orchestrate other AI agentsHave one AI agent act as an orchestrator, directing other agents and monitoring their progress. · 5 min
- HeuristicGrounding AI models in user data for relevanceAI results improve when grounded in your specific files and business data. · 5 min
- Safety tipDefend against prompt injection attacksImprove model resistance to prompt injection by following API documentation guidelines. · 10 min
- Cost tipUnderstand Claude Sonnet 5.5 fallback and block billingLearn how model switching and blocks affect your Claude billing. · 1 min
- Troubleshooting fixTroubleshoot Claude Sonnet 5.5 safety classifier fallbacksResolve issues when Claude Sonnet 5.5 triggers safety classifiers and falls back or blocks requests. · 5 min
- RuleDo not ask Claude to repeat its reasoning verbatimAvoid prompts that explicitly ask Claude to output its internal reasoning or chain of thought. · 1 min
Questions people ask
- Which AI tools does this work with?
- The sources used it with Claude.
- Where did this come from?
- Anthropic News (Anthropic News). Subvolts collected, normalized and credited it; the link above opens the original.