Anthropic

Claude Opus 5

Announced Jul 24, 2026

Fifth generation Opus

What could it do?

Anthropic reported stronger coding, agents and professional work.

What changed?

An update to the Opus tier.

WHY IT MATTERED

Expanded complex task capability.

Where it fell short

Results depend on task and setup.

Sources checked Oct 7, 2026

Release facts were checked against the sources below. Performance claims belong to the developers; we have not independently tested these models.

Developer announcement or release log

Benchmark results

EPOCH AI CAPABILITY ESTIMATE

162.8index points

Tested variant: Claude Opus 5Source interval: 160.1 to 166.5Variant date in source: Jul 24, 2026

A benchmark estimate, not a percentage or capability multiplier. Reasoning settings are not specified in this source table. Historical estimates can change in later snapshots.

Epoch AI methodology ↗Download the source snapshotChecked Oct 7, 2026 · CC BY 4.0

PUBLISHED BENCHMARK RESULT

1490rating points

Tested: claude-opus-5-highText Arena Overall · October 8, 2026Reported interval: 1486 to 149462,934 votes

One explicitly named variant per release. Scores come from the same Overall snapshot; preliminary entries and reported intervals are preserved. These are current ratings of earlier variants, not their launch day ratings.

Source: Text Arena ↗Download selected resultsChecked Oct 8, 2026

Understand the benchmarks Find this release on the chart