AI_SLANG_ENTRY
What Is Claude Opus 5?
Claude Opus 5 is Anthropic's Opus-class Claude model released on July 24, 2026, used for complex agentic coding, enterprise work, and other high-difficulty AI tasks.
What does Claude Opus 5 mean?
Claude Opus 5 is Anthropic's Opus-class Claude model released on July 24, 2026, used for complex agentic coding, enterprise work, and other high-difficulty AI tasks.
Claude Opus 5 is the model name people use when they are talking about Anthropic's high-capability Opus tier in the Claude family. It is not a separate Claude app plan, not a pricing calculator, and not proof that one model wins every possible benchmark.
Origin and usage
Anthropic announced Claude Opus 5 on July 24, 2026. The name entered industry discussion immediately because teams comparing Claude model versions had to distinguish the new Opus-class model from Claude the product, older Opus releases, and other frontier models.
Source type: product-term. Last checked: 2026-07-26.
Official Anthropic product term. Pricing, availability, safeguards, and model IDs are dynamic product facts, so this entry uses Anthropic's July 24, 2026 announcement and current Claude Platform documentation as the baseline.
Why the name is being discussed
New model releases create migration questions: whether a team should move from an older Opus model, which model ID belongs in an API call, and whether the price-performance tradeoff fits the workload.
Searches around Claude Opus 5 often include pricing, API, coding, comparison, and availability intent. Those are reasonable questions, but the useful definition starts with the name: Claude is the product and model family, Opus is the higher-capability model class, and 5 is the current generation label.
Opus, Sonnet, Haiku, Fable, and Mythos
Anthropic uses model-family names to signal different positions in the Claude lineup. Opus 5 is described in current Claude Platform documentation as suited for complex agentic coding and enterprise work. Sonnet 5 is positioned as a faster speed-and-intelligence balance, while Haiku 4.5 is the fastest listed model with near-frontier intelligence.
Fable 5 and Mythos 5 sit above Opus in Anthropic's current model hierarchy. Fable is generally available, while Mythos is limited availability. That naming tells you product positioning, not a public map of internal architecture.
Claude Opus 5 versus Opus 4.8
Anthropic says Opus 5 provides improved performance for the same base API price as Opus 4.8 and highlights gains in coding, knowledge work, scientific research, visual outputs, alignment, and cost-effectiveness. The company also says Opus 5 remains behind Mythos 5 on some risky dual-use areas such as offensive cybersecurity.
That does not mean Opus 5 is automatically better for every prompt, product, latency target, budget, or safety policy. Comparisons depend on the task, effort setting, version, harness, refusal behavior, and cost model.
Pricing and availability
Last checked: 2026-07-26. Anthropic's launch page and Claude Platform documentation list Claude Opus 5 at $5 per million input tokens and $25 per million output tokens. The documented Claude API ID is claude-opus-5.
Anthropic says Opus 5 is available on Claude surfaces including Claude.ai, Claude Code, Claude Cowork, and the Claude Platform. Current documentation also lists availability through the Claude API, Amazon Bedrock, Claude Platform on AWS, Google Cloud, and Microsoft Foundry. Availability can vary by account, region, platform, and policy setting, so Anthropic's docs remain the source of truth.
Common usage
- Claude Opus 5 usually means the specific Anthropic model.
- Opus 5 is a shorter informal form of the same model name.
- Claude Opus can mean the Opus model class generally, so add the version number when precision matters.
- Claude 5 is looser and can be ambiguous because Anthropic has multiple Claude 5-era model names.
Examples
- We are testing Claude Opus 5 for the gnarly migration, but keeping Sonnet for cheaper everyday drafting.
- When someone says Opus 5 in this thread, they mean the model, not the Claude subscription plan.
FAQ
Is Claude Opus 5 a new model?
Yes. Anthropic officially announced Claude Opus 5 on July 24, 2026.
Is Claude Opus 5 the same as Claude 5?
Not exactly. Claude Opus 5 is a specific Opus-class model. Claude 5 is an informal phrase that may refer broadly to the Claude 5 generation and can be ambiguous.
Is Claude Opus 5 available through the API?
Yes. Anthropic's current Claude Platform documentation lists the Claude API ID as claude-opus-5.
Is Opus 5 replacing Opus 4.8?
It is the newer Opus model for many current uses, but replacement depends on the surface, account, migration plan, safeguards, and any provider deprecation schedule.
Is Claude Opus 5 better than GPT-5?
There is no single neutral answer for all work. Results depend on the task, model version, evaluation method, cost, latency, tool setup, and safety behavior, so treat absolute winner claims skeptically.