Ouroboros

BENCHMARKS / PUBLIC EVIDENCE

Scores, status, and evidence.

These results are self-reported, and each row states what evidence is public. The GAIA row is marked while its scrubbed trace capsule is pending. Publication does not wait for a leaderboard maintainer to merge submissions. Terminal-Bench 2.1 closed community submissions on September 19, 2026.

BenchmarkModelOuroborosComparisonStatus and evidence
Terminal-Bench 2.1Claude Opus-5 high86.74% after zeroing one disclosed reward-hack trial (raw: 86.97%)Claude Code + Fable 5: 83.8%Self-reported with a submission and a public run; community submissions closed.
Terminal-Bench 2.1Claude Opus-4.8 high80.22%Claude Code: 78.9%Self-reported with a public run.
Terminal-Bench 2.1GPT-5.584.3%Codex CLI: 83.1%Self-reported with a public run.
Terminal-Bench 2.1Grok-4.584.94%Cursor CLI: 79.3%. Hermes: 77.53%.Self-reported after a reward-hack audit, with a submission; community submissions closed.
OSWorld-VerifiedClaude Opus-590.69%Previous best on the public board: 90.19%Self-reported with public task evidence.
OSWorld-VerifiedClaude Sonnet-4.683.27%Pointer: 81.45%Self-reported with public task evidence.
CL-BenchClaude Sonnet-4.60.2301, rank 1Previous top: 0.1960Self-reported with an open submission and full traces.
SWE-bench ProGPT-5.6-luna58.2%Codex CLI scored 59.4%, with no significant difference.Self-reported with matched-pair traces.
GAIAClaude Sonnet-5129/165, 78.2%Claude Code scored 131/165, 79.4%, while strict pass@1 was 128/165 for both.Self-reported with public methodology; the scrubbed trace capsule is pending.

How to read the table

Each comparison binds a model to a harness. A model score from one harness does not describe the same system as the score from another harness. The repository keeps adapters and methods under devtools/benchmarks.