Claude Opus 4.8 Scores 69.2% on SWE-Bench Pro with New Parallel Agent Features
By
Sophie Zhang
A baker's-dozen of insight crammed into one ring.
Summary
Anthropic's Claude Opus 4.8 achieves 69.2% on SWE-bench Pro, a 4.9 percentage point improvement over its predecessor, placing it second on the public leaderboard behind the unreleased Mythos Preview (77.8%). The model introduces parallel subagent capabilities in Claude Code, allowing hundreds of subagents to work simultaneously on software engineering tasks. Pricing remains unchanged at $5 per million input tokens. The article notes that SWE-bench Verified is nearing saturation at 88.6%, making SWE-bench Pro the key benchmark where meaningful progress remains.
Key quotes
· 3 pulledClaude Opus 4.8 scores 4.9 percentage points higher than its predecessor on SWE-bench Pro, landing at 69.2%
SWE-bench Verified - the easier variant - is approaching saturation at 88.6%. Pro is where real headroom remains, and Anthropic is closing it.
Claude Opus 4.8 ships hundreds of parallel subagents in Claude Code, with pricing unchanged at $5 per million input tokens.
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