Claude Fable 5
Anthropic's new Mythos-class flagship and the most capable coding model anyone can use — 80.3% SWE-Bench Pro, an 11-point jump over Opus 4.8. 1M context, 128K output, native parallel subagents. Released June 9, 2026.
For most students, the best starting point is free — and both ChatGPT (GPT-4o mini free tier) and Claude (Claude Sonnet 4.6 free tier) are genuinely useful without paying. ChatGPT's free tier has the edge for math and science problem-solving, and the Wolfram plugin makes quantitative work significantly stronger. Claude's free tier is the better pick for essay drafting, reading comprehension, and long-form academic writing — the tone and reasoning quality is noticeably better than the equivalent ChatGPT free tier. If budget allows, Claude Pro ($20/mo) is the single best academic upgrade: access to Opus 4.7 for research synthesis plus a 1M token context window that handles entire textbook chapters. Perplexity is the best supplement for research: it searches and cites live sources, which is essential when papers need current references and citation trails.
Last verified:
/Rankings refresh daily when model data changesBest daily driver for coding and writing — the model most developers actually reach for.
Claude's free tier produces better essay and long-form writing quality than ChatGPT's free tier — the clarity and structure of academic writing specifically is a Claude strength.
ChatGPT's free tier with the Wolfram plugin is the stronger tool for math, physics, chemistry, and quantitative subjects — it handles symbolic math and step-by-step problem-solving better.
Perplexity is the best research supplement: unlike ChatGPT or Claude, it searches and cites current web sources rather than relying on training data, which matters for papers requiring recent references.
Use Claude (free tier) for essays, papers, reading comprehension, and academic writing — it consistently produces cleaner academic prose than ChatGPT's equivalent free offering.
Use ChatGPT (free tier) for math, science, coding, and quantitative problem sets — especially with the Wolfram plugin enabled, it handles equations and step-by-step solutions well.
Use Perplexity (free) for research and sourcing — it finds and cites current information, which Claude and ChatGPT cannot do reliably from training data alone.
Use the controls to see how the recommendation changes when your workflow shifts toward quality, cost, speed, or long-context work.
Anthropic / Premium / Jun 9, 2026
New global #1 — 80.3% SWE-Bench Pro, the most capable model generally available.
Ranks models by the broadest mix of coding, writing, research, and long-context usefulness.
You are latency- or cost-sensitive, or your tasks don't need frontier-level reasoning — Opus 4.8 at half the price is plenty.
Strong coding quality with 1M context at $3/1M input
Default model in Cursor and Windsurf, the two most popular AI coding editors
Best writing quality in its price tier — tone, long-form clarity, editorial polish
Claude Opus 4.7 has a higher current premium coding ceiling
GPT-5.5 or GPT-5.4 are better picks when OpenAI computer-use workflows are the priority
Strong backups depending on your budget, workload, and preferred tradeoffs.
Anthropic's new Mythos-class flagship and the most capable coding model anyone can use — 80.3% SWE-Bench Pro, an 11-point jump over Opus 4.8. 1M context, 128K output, native parallel subagents. Released June 9, 2026.
Anthropic's most powerful frontier model — the same underlying model as Fable 5 with safeguards lifted in some areas, restricted to vetted enterprise and research partners. The capability ceiling of mid-2026.
Anthropic's newest Opus flagship — 69.2% SWE-Bench Pro, 88.6% SWE-Bench Verified, 1890 Arena Elo (121 pts ahead of GPT-5.5), and native parallel subagents. Same $5/$25 price as Opus 4.7.
Anthropic's previous Opus flagship for high-stakes coding, reasoning, and deep research before Opus 4.7.
UseRightAI recommendations are based on practical decision factors people actually feel in day-to-day use.
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Claude Sonnet 4.6 is the current top recommendation because it delivers the strongest mix of fit, output quality, and practical usefulness for this category.
Claude 4 Haiku is the strongest lower-cost alternative when you want better value without dropping all the way down in usefulness.
Choose the top pick when you want the safest default. Choose an alternative when your priority shifts toward cost, speed, context window, or a more specialized workflow fit.
Claude 4 Haiku is the cheapest strong alternative here if you want better value without dropping to a weak default.