Author's Description
Fast-mode variant of [Opus 4.8](/anthropic/claude-opus-4.8) - identical capabilities with higher output speed at 2x pricing relative to regular Opus 4.8. Learn more in Anthropic's docs: https://platform.claude.com/docs/en/build-with-claude/fast-mode
Key Specifications
Supported Parameters
This model supports the following parameters:
Features
This model supports the following features:
Performance Summary
Anthropic's Claude Opus 4.8 (Fast) demonstrates strong performance, particularly in speed and reliability. It consistently performs among the fastest models, ranking in the 76th percentile across benchmarks. The model exhibits exceptional reliability with a 99% success rate, indicating minimal technical failures. However, this speed comes at a premium, as its pricing is positioned at the 4th percentile, making it one of the more expensive options. In terms of capabilities, Claude Opus 4.8 (Fast) excels in complex tasks such as Coding (96% accuracy, 94th percentile), Reasoning (94% accuracy, 75th percentile), and Mathematics (94% accuracy, 73rd percentile). It achieved perfect accuracy in Ethics, also being noted as the most accurate and fastest model at its price point for this category. While its General Knowledge (99.5% accuracy) is high, its percentile ranking is moderate. A notable area for improvement is its handling of Hallucinations, where its 94% accuracy places it in the 43rd percentile, suggesting it occasionally struggles to acknowledge uncertainty. Instruction Following (71% accuracy) also presents a moderate performance.
Model Pricing
Current Pricing
| Feature | Price (per 1M tokens) |
|---|---|
| Prompt | $10 |
| Completion | $50 |
| Input Cache Read | $1 |
| Input Cache Write | $12.5 |
| Web Search | $10000 |
Price History
Available Endpoints
| Provider | Endpoint Name | Context Length | Pricing (Input) | Pricing (Output) |
|---|---|---|---|---|
|
Anthropic
|
Anthropic | anthropic/claude-4.8-opus-fast-20260528 | 1M | $10 / 1M tokens | $50 / 1M tokens |
Benchmark Results
| Benchmark | Category | Reasoning | Strategy | Free | Executions | Accuracy | Cost | Duration |
|---|
Other Models by anthropic
|
|
Released | Params | Context |
|
Speed | Ability | Cost |
|---|---|---|---|---|---|---|---|
| Anthropic: Claude Opus 4.8 | May 27, 2026 | — | 1M |
Image input
File input
Text input
Text output
|
★★★★ | ★★★★ | +$$$$$ |
| Anthropic: Claude Opus 4.7 (Fast) | May 12, 2026 | — | 1M |
Image input
File input
Text input
Text output
|
— | — | +$$$$$ |
| Anthropic: Claude Opus 4.7 Unavailable | Apr 16, 2026 | — | 1M |
Image input
Text input
Text output
|
★★★★ | ★★★★★ | +$$$$$ |
| Anthropic: Claude Opus 4.7 | Apr 16, 2026 | — | 1M |
Image input
File input
Text input
Text output
|
★★★★ | ★★★★★ | +$$$$$ |
| Anthropic: Claude Opus 4.6 (Fast) | Apr 07, 2026 | — | 1M |
Image input
File input
Text input
Text output
|
— | — | +$$$$$ |
| Anthropic: Claude Sonnet 4.6 | Feb 17, 2026 | — | 1M |
Image input
File input
Text input
Text output
|
★★★★ | ★★★★ | $$$$$ |
| Anthropic: Claude Opus 4.6 | Feb 04, 2026 | — | 1M |
Image input
File input
Text input
Text output
|
★★★ | ★★★★★ | +$$$$$ |
| Anthropic: Claude Opus 4.5 | Nov 24, 2025 | — | 200K |
Image input
File input
Text input
Text output
|
★★★ | ★★★★★ | +$$$$$ |
| Anthropic: Claude Haiku 4.5 | Oct 15, 2025 | — | 200K |
Image input
File input
Text input
Text output
|
★★★★ | ★★★★ | $$$$ |
| Anthropic: Claude Haiku 4.5 Unavailable | Oct 14, 2025 | — | 200K |
Image input
Text input
Text output
|
— | — | $$$$$ |
| Anthropic: Claude Sonnet 4.5 | Sep 29, 2025 | — | 1M |
Image input
File input
Text input
Text output
|
★★★ | ★★★★ | $$$$$ |
| Anthropic: Claude Opus 4.1 | Aug 05, 2025 | — | 200K |
Image input
File input
Text input
Text output
|
★★★ | ★★★★ | +$$$$$ |
| Anthropic: Claude Opus 4 | May 22, 2025 | — | 200K |
Image input
File input
Text input
Text output
|
★★★ | ★★★★ | +$$$$$ |
| Anthropic: Claude Sonnet 4 | May 22, 2025 | — | 1M |
Image input
File input
Text input
Text output
|
★★★ | ★★★★ | $$$$$ |
| Anthropic: Claude 3.7 Sonnet Unavailable | Feb 24, 2025 | — | 200K |
Image input
File input
Text input
Text output
|
★★★ | ★★★★ | $$$$$ |
| Anthropic: Claude 3.5 Haiku | Nov 03, 2024 | — | 200K |
Image input
Text input
Text output
|
★★★★ | ★★★ | $$$$ |
| Anthropic: Claude 3.5 Haiku (2024-10-22) Unavailable | Nov 03, 2024 | — | 200K |
Image input
File input
Text input
Text output
|
★★★★ | ★★★ | $$$$ |
| Anthropic: Claude 3.5 Sonnet Unavailable | Oct 21, 2024 | ~400B | 200K |
Image input
File input
Text input
Text output
|
★★★ | ★★★★ | +$$$$$ |
| Anthropic: Claude 3.5 Sonnet (2024-06-20) Unavailable | Jun 19, 2024 | ~400B | 200K |
Image input
File input
Text input
Text output
|
★★★★ | ★★★★ | $$$$$ |
| Anthropic: Claude 3 Haiku | Mar 12, 2024 | ~20B | 200K |
Image input
Text input
Text output
|
★★★★★ | ★★ | $$$ |
| Anthropic: Claude 3 Sonnet Unavailable | Mar 04, 2024 | ~200B | 200K |
Image input
Text input
Text output
|
★★★★ | ★★★★ | $$$$$ |
| Anthropic: Claude 3 Opus Unavailable | Mar 04, 2024 | ~2T | 200K |
Image input
Text input
Text output
|
★★★ | ★★★ | +$$$$$ |
| Anthropic: Claude v2 Unavailable | Nov 21, 2023 | 137B | 200K |
Text input
Text output
|
★★ | ★★★ | +$$$$$ |
| Anthropic: Claude v2.1 Unavailable | Nov 21, 2023 | 137B | 200K |
Text input
Text output
|
★★★ | ★★★ | +$$$$$ |
| Anthropic: Claude v2.0 Unavailable | Jul 27, 2023 | 137B | 100K |
Text input
Text output
|
★★★ | ★★★ | +$$$$$ |