June 02, 2026
Last updated: June 03, 2026
Claude Opus 4.8: Pricing, benchmarks, and which model to actually run in 2026
By Lyne Carolyne
Contents
- What actually changed in Claude Opus 4.8?
- How much does Claude Opus 4.8 cost?
- Opus 4.8 vs. Sonnet 4.6: Should you use Opus 4.8 or Sonnet 4.6?
- Opus 4.8 vs. GPT-5.5: How does Opus 4.8 compare to GPT-5.5?
- How do you get started with Claude Opus 4.8?
- How does CloudZero track Claude Opus 4.8 costs in real time?
- Claude Opus 4.8 FAQs
Quick Answer
Claude Opus 4.8 launched May 28, 2026 at $5 input / $25 output per million tokens, same price as Opus 4.7. Four things changed: Dynamic Workflows for parallel agentic coding, Effort Control for managing reasoning depth and cost per call, a Fast Mode now 3x cheaper than Opus 4.7's, and mid-task system messages now out of beta. API model ID: claude-opus-4-8.
What actually changed in Claude Opus 4.8?
Anthropic called this release “ modest but tangible.” That is honest. The benchmark gains are real. No single number is a revolution. What makes 4.8 worth reading about is four changes that land differently depending on how your team uses Claude.
The number nobody talked about: USAMO 2026
Claude Opus 4.8 scored 96.7% on the USAMO 2026 math benchmark, up from 69.3% on Opus 4.7.
Dynamic workflows: Powerful, and expensive if you do not plan
Dynamic Workflows is the biggest engineering feature in this release. Each sub-agent runs its own token count. A 50-agent session costs approximately 50x the tokens of a single-agent equivalent. CloudZero tracks Dynamic Workflow sessions by workspace.
Mid-task system messages: One less workaround
Mid-conversation system message updates on the Messages API are now generally available. Claude’s instructions can update during a long session.
Fast mode: 3x cheaper than it was
Fast Mode at 2.5x speed existed on Opus 4.7. What is new in 4.8 is the price: $10 input / $50 output per million tokens, 3x cheaper than Opus 4.7’s Fast Mode.
Effort control: The cost dial everyone else called a quality feature
Four settings: low, high (default), extra/xhigh, and max.
- High uses roughly the same tokens as Opus 4.7 default but with better output
- Low uses fewer tokens and responds faster
- Max uses more of both
The AI Cost Optimization Playbook
Traditional cloud cost management is broken. Here’s why — and how to make the switch to cloud cost intelligence.
How much does Claude Opus 4.8 cost?
The pricing page held flat.
Pricing table
| Mode | Input per 1M tokens | Output per 1M tokens | Speed |
|---|---|---|---|
| Standard | $5.00 | $25.00 | Baseline |
| Fast Mode (optional) | $10.00 | $50.00 | 2.5x faster |
Context window: 1M input / 128K output. On by default, no API flag needed.
Three things that will affect your actual bill
- Upgrading from Opus 4.6 directly? A tokenizer change introduced in 4.7 can increase effective token counts by up to 35%.
- Effort Control defaults to high.
- Dynamic Workflows scale with sub-agent count.
Opus 4.8 vs. Sonnet 4.6: Should you use Opus 4.8 or Sonnet 4.6?
Opus 4.8 is better on the benchmarks that matter for complex work. What is in question is whether that quality difference justifies $22 more per million output tokens for your specific tasks.
When Opus 4.8 makes sense
- Serious agentic coding.
- Computer use tasks.
- Complex financial and reasoning tasks.
- Selective routing at max effort.
When Sonnet 4.6 Is the Right Answer
Claude Sonnet 4.6 costs $3 input / $15 output per million tokens. For most of what production AI systems do most of the time, that 15% quality gap does not change the business result.
| Monthly Output | Opus 4.8 | Sonnet 4.6 | Monthly Difference |
|---|---|---|---|
| 100M tokens | $2,500 | $1,500 | $1,000 |
| 500M tokens | $12,500 | $7,500 | $5,000 |
| 1B tokens | $25,000 | $15,000 | $10,000 |
Opus 4.8 vs. GPT-5.5: How does Opus 4.8 compare to GPT-5.5?
Opus 4.8 and GPT-5.5 are both priced at $5 input / $25 output per million tokens. Where Opus 4.8 leads: SWE-bench Pro at 69.2% vs. 58.6%.
How do you get started with Claude Opus 4.8?
API model ID: claude-opus-4-8
How does CloudZero track Claude Opus 4.8 costs in real time?
CloudZero integrates directly with Anthropic.
Claude Opus 4.8 FAQs
When was Claude Opus 4.8 released?
May 28, 2026.
How much does Claude Opus 4.8 cost?
$5.00 input / $25.00 output per million tokens at standard pricing, unchanged from Opus 4.7.
What is the API model ID for Claude Opus 4.8?
claude-opus-4-8.
What is the context window for Claude Opus 4.8?
1 million input tokens and 128,000 output tokens.
Opus 4.8 or Sonnet 4.6?
Opus 4.8 for complex tasks, Sonnet 4.6 for most production work.