Claude 3.5 Haiku vs Claude Opus 4.8 (Fast)
How do these models stack up? Below is an expert side-by-side comparison of specifications, context window capacity, live pricing per million tokens, and standardized benchmark scores for Claude 3.5 Haiku and Claude Opus 4.8 (Fast).
Claude 3.5 Haiku
Claude 3.5 Haiku is the fast, cost-efficient member of the Claude 3.5 model family from Anthropic, built to deliver strong performance for coding, text processing, and multi-turn conversation at minimal inference cost. With a 200,000-token context window and pricing at $0.80/MTok for input, it is optimized for high-throughput, latency-sensitive production applications such as real-time chat interfaces, code completion tools, and classification systems. While smaller than its Sonnet and Opus siblings, Claude 3.5 Haiku retains Anthropic's strong alignment and safety properties, making it a reliable choice for consumer-facing AI features.
Claude Opus 4.8 (Fast)
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
Technical Specifications
| Specification | Claude 3.5 Haiku | Claude Opus 4.8 (Fast) |
|---|---|---|
| Provider | Anthropic | Anthropic |
| Context Window | 200,000 tokens | 1,000,000 tokens |
| Agent Suitability | N/A | N/A |
| Time to First Token (TTFT) | N/A | N/A |
| Deployment Model | N/A | managed api |
| Production Stability | stable | beta |
| API Available | Yes | Yes |
| Released Date | 2024-11-04 | 2026-05-27 |
API Pricing Comparison
Input Price per Million Tokens
Claude 3.5 Haiku
$0.80
Claude Opus 4.8 (Fast)
$10.00
Output Price per Million Tokens
Claude 3.5 Haiku
$4.00
Claude Opus 4.8 (Fast)
$50.00
Want to test both models live?
Run side-by-side prompt prompts in our dynamic Sandbox. Check execution speeds, latency metrics, and compute actual costs in real-time.
Benchmark Performance Metrics
Scores show the raw performance percentages verified across key evaluation suites. Higher bars indicate superior accuracy and capability in that domain.
Claude 3.5 Haiku Quirks & Gotchas
No developer gotchas reported.
Claude Opus 4.8 (Fast) Quirks & Gotchas
No developer gotchas reported.