Claude Opus 4.8
Anthropic
Anthropic's premium Claude model (May 2026), delivering flagship-class reasoning and agentic coding below Fable 5 pricing. Opus 4.8 keeps Opus 4.7's $5/$25 pricing while using ~35% fewer output tokens on agentic coding, with a 1M-token context window, 128K output, adaptive thinking, and mid-conversation system messages.
Strengths
- Premium flagship-class reasoning and agentic coding below Fable 5 pricing
- Uses ~35% fewer output tokens than Opus 4.7 on agentic coding
- 1M-token context window at standard pricing with 128K max output
- Strong SWE-bench Verified coding, Terminal-Bench command-line, and GPQA science reasoning
- Leads the GDPval-AA economic-task leaderboard, ahead of GPT-5.5
- Adaptive thinking, mid-conversation system messages, Workflows in Claude Code (preview)
Caveats
- Premium Opus pricing ($5/$25) versus Sonnet 5 ($3/$15 after intro)
- No audio input (text + vision only)
- Fast mode is a paid research preview at ~2x the token rates
- Vendor
- Anthropic
- Context Window
- 1,000,000 tokens
- Max Output
- 128,000 tokens
- License
- Proprietary
- Release Date
- 2026-05-28
- Modalities
- textimage
Capabilities
Vision
Audio
Video
Tool Use
Resources
Pricing
$5 per 1M input tokens, $25 per 1M output tokens (same as Opus 4.7); full 1M-token context at standard pricing, with long-context pricing above 200K input. Fast mode research preview at $10/$50 (~2.5x faster).