Anthropic: Claude Opus 5

Strongest Claude Opus model for coding, agents, and professional work

claude-opus-5

AvailableAnthropicChatCached input 90% less

Input / Output-70%: $5.00 / $25.00$1.50 / $7.50
Context: 1M
Released: Jul 24, 2026
Max output: 128K
Modalities: VisionChat
Capabilities: Tool usePrompt CacheReasoning

About Claude Opus 5

Claude Opus 5 is Anthropic's Opus-tier model released on July 24, 2026, for coding, agents, and professional work. It improved on Opus 4.8 with adaptive thinking, image input, and tool use. Anthropic reports gains in life sciences, financial modeling, and legal agent work. Opus 5.5 has since replaced it as the current Opus.

Where it works well

Anthropic reports it doubled Opus 4.8 on Frontier-Bench v0.1 at lower cost.
On CursorBench 3.2 it comes close to Fable 5's top score at half the cost, per the launch post.
Agentic coding runs are steadier from run to run, according to an early-access team that compared it with Opus 4.7.
Professional gains cited by Anthropic include financial modeling accuracy and a clear step up on legal agent work.

When to choose another model

It stays behind Mythos 5 on cybersecurity exploitation, and Anthropic says it does not advance the frontier on risky dual-use capabilities.
Its reliable knowledge cutoff is May 2026, a month earlier than Opus 5.5.
Opus 5.5 is Anthropic's recommended Opus now, with better results and faster output.

Getting started

Create API key
Create a key in Console, then use it with every model on the platform.

Send your first request

Copy the example for your language and run it against the endpoint.

Text to textMessages API

POST/v1/messages

API format:

curl https://api.tokenlab.sh/v1/messages \
  -H "Content-Type: application/json" \
  -H "x-api-key: sk-xxx" \
  -H "anthropic-version: 2023-06-01" \
  -d '{
    "model": "claude-opus-5",
    "max_tokens": 1024,
    "messages": [
      {"role": "user", "content": "Hello!"}
    ]
  }'

Pricing

The Verified price applies to Verified, which costs less on most models. The Official price is the model maker's published price and applies to the more reliable Official route. Auto bills the route that completes the request.

Default spec

per 1M tokens

Official price: Input $5.00 / Output $25.00 / Cache read $0.50 / Cache write $6.25 / Cache write (1h) $10.00
Verified price: Input $1.50 / Output $7.50 / Cache read $0.15 / Cache write $1.88 / Cache write (1h) $3.00
Discount: -70%

Prompt cache pricing

Cache read

Official price: $0.50
Verified price: $0.15
Discount: -70%

Cache write

Official price: $6.25
Verified price: $1.88
Discount: -70%

Cache write (1h)

Official price: $10.00
Verified price: $3.00
Discount: -70%

Tool fees

Charged per call, only when the model uses the tool.

Web search

Official price: $0.01/search
Verified price: $0.003/search
Discount: -70%

	Official priceper 1M tokens	Verified priceper 1M tokens	Discount
Default spec	Input $5.00 / Output $25.00 / Cache read $0.50 / Cache write $6.25 / Cache write (1h) $10.00	Input $1.50 / Output $7.50 / Cache read $0.15 / Cache write $1.88 / Cache write (1h) $3.00	-70%
Prompt cache pricing
Cache read	$0.50	$0.15	-70%
Cache write	$6.25	$1.88	-70%
Cache write (1h)	$10.00	$3.00	-70%
Tool feesCharged per call, only when the model uses the tool.
Web search	$0.01/search	$0.003/search	-70%

Usage & activity

Success rate is the share of requests that completed. Latency is how long a full response takes; P95 means 95% of requests finished within that time.

Usage & availability

Last 24 hours

Requests
Success rate
P95 latency
Total tokens

Model performance

Last updated Nov 1, 2026, 6:33 AM UTC

30-day success rate: 99.8%
30-day requests: 2K+
Last active: 3 days ago

Data is based on aggregate user requests, excluding status checks.

Open in Console

Open Claude Opus 5 in Console with a prompt ready to edit or send.

Help me try claude-opus-5 with a short message at /v1/messages. Show the reply, latency, and cost.

Use cases

Best for

Reasoning
Vision

Financial modeling
Build and audit spreadsheet models, reconcile statements, and explain variances where Anthropic reports higher accuracy at each effort level.
Agentic debugging
Hand it a bug report in an open-source project and let it reproduce, trace the root cause, and write the fix with a test.
Legal agent work
Review a contract set, track defined terms across documents, and flag conflicting clauses with section references.

Prompt examples

Build a three-statement model from these filings and show which assumption drives the cash-flow gap.

This test fails intermittently in CI. Reproduce it, find the root cause, and fix it without loosening the assertion.

Compare the indemnity clauses across these five agreements and rank them from most to least favorable to us.

This model has conditional pricing. Monthly token totals alone cannot produce a reliable estimate; use the detailed pricing for the request specification, cache, and applicable time window.

FAQ

What is Claude Opus 5 best at?

Coding agents and professional work. Anthropic reports large gains over Opus 4.8 on Frontier-Bench, CursorBench, and OSWorld, plus improvements in life sciences, financial modeling, and legal tasks.

How is Opus 5 different from Opus 4.8?

Opus 5 is a new generation: Anthropic reports it doubles Opus 4.8 on Frontier-Bench v0.1 at lower cost and runs more steadily across agentic coding tasks. It has a later knowledge cutoff and adaptive thinking with high default effort.

Should I upgrade from Claude Opus 5 to Opus 5.5?

Yes for most work. Anthropic recommends it and reports faster output, fewer tokens and turns for equal work, and better results on Terminal-Bench 4.0. Read the migration guide first, because 5.5 always thinks and rejects forced tool use.

Does Claude Opus 5 take images?

Yes. It accepts text and images and returns text. Anthropic's launch post describes a case where it wrote its own computer vision pipeline when it was unable to view an image directly.

How much does Claude Opus 5 cost?

On TokenLab, Claude Opus 5 costs Input $1.50 / Output $7.50 per 1M tokens. The pricing table above shows the full breakdown. Rates depend on the billing unit, specification, and usage. Compare matching conditions in the model's detailed pricing; a single rate does not determine the total cost.

What are the context window and output limit of Claude Opus 5?

Claude Opus 5 accepts up to 1,000,000 tokens of context and returns up to 128,000 tokens in one response.

Which endpoint should Claude Opus 5 use?

Use https://api.tokenlab.sh/v1/messages for Claude Opus 5. The request example below shows the matching code shape.

Which operations does Claude Opus 5 support?

Claude Opus 5 supports Text to text. Select an operation above to see its endpoint and request example.