Compare Claude Haiku with Luna, Sonnet and Opus
Choose around the work you need to finish: a quick answer, a reliable summary, a checked table or a more complex investigation.
These guides separate model specifications from the limits of this workspace. We cite published evaluations and explain their limits; task examples are evaluation suggestions, not claimed test results. HaikuChat defaults to Haiku 5.5, with Haiku 4.5 also available. Other models discussed here are comparisons, rather than additional workspace options.
Start with the current models
Compare small models for frequent tasks, or decide when a more capable tier is worth evaluating.
Claude Haiku 5.5 vs GPT-6 Luna
Compare Haiku 5.5 and GPT-6 Luna on pricing tiers, context, published benchmarks, summaries, and extraction. Choose for your actual workload.
Read comparison →When is a step up worth it?Claude Haiku 5.5 vs Sonnet 5.5
Decide between Haiku 5.5 and Sonnet 5.5 for summaries, extraction, coding, and complex work. Compare costs, context, and published benchmark evidence.
Read comparison →Everyday throughput or deeper investigation?Claude Haiku 5.5 vs Opus 5.5
Compare Haiku 5.5 and Opus 5.5 for everyday tasks and complex analysis. Understand the cost gap, reasoning differences, and when to choose either model.
Read comparison →Compare versions and model families
Search results often mix generations. Match the exact versions in your current workflow before drawing a conclusion from a price or a score.
Claude Haiku 5.5 vs Sonnet 5
Compare current Haiku 5.5 with Sonnet 5, including version identity, context, token rates and how to evaluate replacing an existing Sonnet workflow.
Read comparison →An existing Haiku workflow facing a larger modelClaude Haiku 4.5 vs Sonnet 5
Compare Haiku 4.5 and Sonnet 5 on context, output limits, thinking behavior, cost and migration decisions for an existing workflow.
Read comparison →Compare earlier generations without mixing versionsClaude Haiku 4.5 vs Sonnet 4.6
Understand Haiku 4.5 versus Sonnet 4.6: published rates, context, reasoning controls and how to choose for summaries, extraction and complex work.
Read comparison →Choose a capability tier before comparing a scoreClaude Haiku vs Sonnet vs Opus: Which Should You Choose?
Choose between Claude Haiku, Sonnet and Opus for everyday tasks and deeper work. Compare the 5.5 lineup with scenario-based selection and escalation rules.
Read comparison →Explore the benchmark evidence
Read the full score table, compare evaluation conditions and choose a test for your own work.
A useful way to choose
Write down what a correct result must contain. Test the same material, count failed attempts, and compare editing time as well as model usage. A correct, short extraction and an open-ended investigation need different checks.
Ready for a chat, summary or table? Open HaikuChat and check current availability, or review HaikuChat credit packs.