Straight answers, pulled from across all 10 breakdowns.
What is Claude Opus 5?
Claude Opus 5 is Anthropic’s new default Opus model, launched July 24, 2026 and included in every paid Claude plan (Pro, Max, Team, Enterprise) with no extra usage cap. It’s positioned as near-Fable-5 capability at roughly half the price, and it’s now the default model on Claude Max and the strongest model available to Claude Pro. Anthropic pitches it as state-of-the-art on its own coding evals while costing the same per token as the older Opus 4.8.
Opus 5 vs Fable 5 — which is better?
It’s close, and cost is the tiebreaker. Anthropic’s own charts put Opus 5 at or near Fable 5 on most benchmarks while costing about half as much per task. Creators split the live tests 1-1 to 2-1 on raw output quality — Naman and Alex Finn preferred Opus 5’s visual builds, while Fable 5 still led on a denser flight-sim city and on multidisciplinary reasoning, legal, and health tasks. The consensus: comparable power, but Opus 5 wins on price.
Opus 5 vs Opus 4.8 — what changed?
Same price ($5/$25 per million input/output tokens), much bigger model. Opus 5 more than doubles Opus 4.8 on Frontier-Bench software-engineering tasks (43.3% vs 21.1% in Nick Saraev’s reading), and jumps from 1.5% to 30.2% on ARC-AGI-3 novel problem-solving — a 20x leap in one generation. Chase AI calls the 4.8-to-5 jump a bigger leap than the gap between Opus 5 and Fable 5. The new behaviors are self-verification and error recovery: it checks its work against a goal and iterates instead of one-shotting.
How much does Opus 5 cost, and is it worth it?
$5 per million input tokens and $25 per million output tokens — unchanged from Opus 4.8 and about half of Fable 5’s rate. The important number is cost-per-task, not price-per-token: in a head-to-head 3D city simulation, Opus 5 finished for $4.20 versus Fable 5’s $9.60. Watch out for the price-per-token trap — Kimi K3 is cheaper per token but burned roughly twice the tokens to finish the same task, netting the same real cost. For near-frontier work at lower total cost, most creators judged it worth defaulting to.
What effort level should I use on Opus 5?
Medium is the sweet spot for most work; drop to low for simple tasks and only reach for high on the genuinely hard 20%. Chase AI found dropping from max to low effort cut cost per task from about $22 to $3.76 — over 80% — while low effort still hit a 60% pass rate on a long-horizon agentic benchmark. Every went further: Opus 5 actually performs better at medium or low than at high or max, so cranking the dial can cost you both money and quality.
Is Opus 5 good at coding?
Yes — it’s state-of-the-art on Anthropic’s agentic coding evals, leading Frontier-Bench at 43.3% and one-shotting playable game clones, a macOS clone, and 3D simulations in creator tests. Its real edge is cost-per-task and self-verification: fixing bugs at the root cause and building its own test harnesses. Caveats: Fable 5 and Kimi K3 still edge it on some front-end polish and cybersecurity work, and Every found it stops early on big, complex skill files. Codex users on GPT-5.6 saw little reason to switch.