Anthropic

Claude 2

Announced Jul 11, 2023

Longer documents enter the conversation

What could it do?

It improved on coding, math, and reasoning, read inputs up to 100K tokens, and wrote longer documents in one pass.

What changed?

Expanded the context window and improved coding performance.

WHY IT MATTERED

Longer context

Made document oriented assistant workflows more practical.

Where it fell short

A large context window does not guarantee every detail is used correctly.

Research draft

Capabilities describe the developer’s announcement. This entry has not completed source review.

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Benchmark results

EPOCH AI CAPABILITY ESTIMATE

120.1index points

Tested variant: Claude 2Source interval: 113.0 to 123.8Variant date in source: Jul 11, 2023

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

Understand the benchmarks Find this release on the chart