Claude Haiku 3.5
Claude Haiku 3.5 is optimized for speed and efficiency. It is a good fit for summarization, extraction, categorization, and other high-volume assistant tasks where low latency and low cost matter most.
- Very fast responses
- Low cost per task
- Strong summarization and extraction
- Good for scaled automation
- Not the best option for hard reasoning
- Weaker on nuanced coding tasks
- Limited for deep multi-step planning
- Needs more guidance on complex tasks
Best fit
- summaries
- classification
- support workflows
- light automation
- hard research
- frontier coding
- deep multi-step analysis
At a glance
Category research paths
Strong alternatives
Comparisons featuring Claude Haiku 3.5
See alternativesSee also
ChatGPT (chatgpt)ChatGPT
General-purpose AI assistant with the strongest everyday product depth.
ChatGPT remains the broadest consumer and productivity platform in the AI market. It combines strong reasoning, writing, coding, multimodal workflows, and a large ecosystem of integrations, making it the default option for many users who want one tool to cover many jobs.
Claude
Long-context AI model built for writing, analysis, and careful synthesis.
Claude remains one of the strongest options for document-heavy work, thoughtful writing, and reasoning over large inputs. It is especially valued by users who work with long PDFs, contracts, strategy docs, and research synthesis.
Claude Opus 5
Anthropic's top-tier reasoning model for the hardest analysis and coding tasks.
Claude Opus 5 is Anthropic's highest-end model for difficult reasoning, strategic synthesis, and deep software work. It is the best fit when output quality and careful reasoning matter more than raw speed or price.
Claude Sonnet 5
Leading balanced model for coding, writing, and daily production work.
Claude Sonnet 5 is the stronger general-purpose default for teams that need a single model for coding, writing, and analysis with high reliability. It blends strong reasoning with a highly usable production profile for real work.
Claude Haiku 4.5
Fast, low-cost frontier model for summaries, routing, and high-volume assistant work.
Claude Haiku 4.5 is Anthropic's fastest modern frontier model, optimized for cheap high-throughput work without giving up much general quality. It is a strong default for summaries, classification, routing, and lightweight automation at scale.
Claude Opus 4
Anthropic's flagship model for deep reasoning, coding, and analysis.
Claude Opus 4 is Anthropic's most capable model for complex reasoning, long-context synthesis, and high-stakes coding tasks. It is built for work where quality and careful execution matter more than raw speed.