Claude Opus 5 Review: Benchmarks, Pricing & Features (July 2026)

Claude Opus 5 Is Here — And It Changes Everything

Anthropic dropped a bombshell on July 24, 2026. Claude Opus 5 is now live and available to all Claude Max and Claude Pro subscribers, and its benchmark numbers are unlike anything the AI industry has seen before. On ARC-AGI 3 — the gold standard test for genuine reasoning ability — Opus 5 scored 30.2 percent. The previous record stood at 7.8 percent, set by OpenAI's GPT-5.6 Sol. Anthropic has not just beaten the competition. It has lapped it.

This article breaks down everything you need to know: what Opus 5 can actually do, how it compares to GPT-5.6 Sol and Gemini 2.5 Ultra, what it costs, and whether you should switch.

What Is Claude Opus 5?

Claude Opus 5 is Anthropic's new flagship reasoning model. It replaces Opus 4.8 as the top-of-the-line Claude model and is now the default model on Claude Max and the strongest model available on Claude Pro. It sits below the Fable-class and Mythos-class internal models in Anthropic's hierarchy, but for the vast majority of real-world tasks — coding, writing, analysis, agentic workflows — it outperforms everything else on the market.

The model is designed around a core philosophy: efficiency-first intelligence. Rather than simply scaling compute to get better answers, Anthropic has tuned Opus 5 to get more useful work from every single token. That translates directly to lower costs per completed task — even when the per-token price is similar to competing models.

The Benchmark Numbers You Need to Know

ARC-AGI 3: The Reasoning Earthquake

ARC-AGI 3 is designed by the ARC Prize Foundation to measure whether AI systems can solve genuinely novel problems — tasks they have never encountered in training. It is widely considered the hardest public benchmark for AI reasoning today.

Claude Opus 5 scored 30.2 percent on ARC-AGI 3. The previous best was 7.8 percent from OpenAI's GPT-5.6 Sol. That is not a marginal improvement — it is a nearly four-fold leap in a single model generation. According to ARC Prize's analysis, the lead comes from "stronger logical reasoning, which enables more autonomous exploration, planning, and execution across unfamiliar environments."

During testing, Opus 5 showed behaviours researchers had never seen from an AI before. It translated tasks into algebraic notation independently, formulated reflection equations from scratch, and solved five previously unsolved ARC-AGI environments, four of them at or above human-level performance.

Frontier-Bench v0.1: Coding Supremacy

Frontier-Bench is a rigorous software engineering evaluation that measures whether models can complete real, production-quality coding tasks end to end. On Frontier-Bench v0.1, Opus 5 surpasses all other models and more than doubles its predecessor Opus 4.8's performance — at the same cost per task.

CursorBench 3.2: Matching Fable 5 at Half the Price

CursorBench 3.2 tests models in the kind of coding workflows that developers actually use every day — refactoring, debugging, multi-file edits, and understanding large codebases. At maximum effort, Opus 5 performs within 0.5% of Claude Fable 5's peak score, but at roughly half the cost per task. For developers, that is a decisive advantage.

OSWorld 2.0: Best Computer Use Model Available

OSWorld 2.0 is a benchmark for computer use — the ability to actually navigate a real desktop environment, use software, and complete tasks autonomously. Claude Opus 5 outperforms every other model at any given cost on OSWorld 2.0, and surpasses Fable 5's best result at just over one-third of the cost.

Zapier AutomationBench: Business Task Completion

Zapier AutomationBench tests whether models can complete realistic business automation tasks from start to finish. Opus 5's pass rate is approximately 1.5 times higher than the next-best model at the same cost. Even at its lowest effort setting, Opus 5 passes more tasks than any other model running at peak output.

Pricing: $5 Input / $25 Output Per Million Tokens

Claude Opus 5 is priced at $5 per million input tokens and $25 per million output tokens via the Anthropic API — a significant reduction compared to Opus 4.8 at the same capability level. The model supports a 1 million token context window, making it viable for processing entire codebases, legal document sets, or long research corpora in a single session.

For comparison, Claude Fable 5 costs substantially more per task. GPT-5.6 Sol, while slightly cheaper per token on some tiers, completes fewer tasks successfully — meaning the effective cost-per-success for Opus 5 is dramatically lower across the benchmarks that matter.

The model also supports an effort setting that lets you dial intelligence up or down. At lower effort settings, you get faster responses at lower cost; at maximum effort, you unlock the full reasoning capability. This makes Opus 5 genuinely flexible for production workloads where cost management matters.

What Makes Opus 5 Different From Previous Versions?

Genuine Reasoning, Not Pattern Matching

The ARC-AGI 3 results signal something important: Opus 5 appears to be doing something qualitatively different when it solves problems. The fact that it independently invented algebraic notation to represent tasks and formulated new reflection equations suggests the model is genuinely constructing solution strategies rather than retrieving them from training data.

The ARC Prize team put it plainly: the lead is due to "stronger logical reasoning" — not better prompting, not larger context, not more compute thrown at the problem. The architecture itself appears to have improved.

Proactive and Efficient

Anthropic describes Opus 5 as "thoughtful and proactive." In practice, this means the model tends to ask clarifying questions earlier, flag potential issues before they become problems, and suggest improvements to the task it's been given. For agentic workflows where human oversight is limited, this behaviour reduces the chance of a model going silently off the rails.

The New Default for Claude Max

Opus 5 replaces Opus 4.8 as the default model on Claude Max subscriptions. If you are already paying for Claude Max, you get Opus 5 automatically — no upgrade required.

How Does It Compare to GPT-5.6 Sol and Gemini 2.5 Ultra?

Benchmark	Claude Opus 5	GPT-5.6 Sol	Gemini 2.5 Ultra
ARC-AGI 3	30.2%	7.8%	~12%
Frontier-Bench	#1	#2	#3
CursorBench 3.2	~Fable 5 level	Leads in Codex	Competitive
OSWorld 2.0	#1	#2	#2
Cost per task	Lowest	~1/3 less than Fable	Mid-range

On raw reasoning benchmarks, Claude Opus 5 is currently the strongest publicly available model in the world. GPT-5.6 Sol remains competitive on agentic coding workflows, particularly in OpenAI's Codex harness, and Gemini 2.5 Ultra holds advantages on long-context tasks thanks to its 2 million token context window. But on the tasks that measure genuine intelligence — novel problem solving, autonomous planning, business automation — Opus 5 is in a class of its own.

Who Should Use Claude Opus 5?

Use Opus 5 if you:

Do serious software engineering — debugging, refactoring, multi-file changes
Run automated agentic workflows where success rate matters more than raw speed
Work with large documents or codebases that require multi-step reasoning
Care about getting the smartest possible answer and are willing to pay for it

Stick with a faster/cheaper model if you:

Need real-time responses for simple tasks (use Claude Haiku or GPT-4o mini)
Run very high volumes where cost is the primary constraint
Are building quick prototypes and iteration speed matters more than accuracy

The Bottom Line

Claude Opus 5 is the most capable AI model available to the public as of July 2026. Its ARC-AGI 3 score is not just a benchmark number — it represents a genuine step forward in machine reasoning. The fact that it achieves this at a competitive price point, with a 1 million token context window and strong performance across coding, automation, and knowledge work, makes it the go-to choice for any serious AI application.

Anthropic has been quiet in recent months while OpenAI dominated headlines with GPT-5.6 Sol. With Opus 5, they have made an emphatic statement: the race for AI supremacy is far from over, and Anthropic is competing for the top spot.

Source: Anthropic Official Announcement · The Decoder Analysis

Claude Opus 5 Is Here: Anthropic's Most Powerful Model Yet Crushes Every Benchmark