Claude 2
AnthropicClaude 2 was released on July 11, 2023 as Anthropic's second-generation model. It introduced a dramatically expanded context window of 100,000 tokens — among the largest at the time — and improved coding and reasoning capabilities compared to Claude 1. Scored 78.5% on MMLU and 71.2% on HumanEval. Available via API and the claude.ai interface. Superseded by Claude 3 in March 2024.
Benchmarks2
Claude Family14
| Model | Tier | Released | Input $/MTok |
|---|---|---|---|
| Claude Sonnet 4.6 | sonnet | 2026-02-17 | $3.00 |
| Claude Opus 4.6 | opus | 2026-02-05 | $5.00 |
| Claude Opus 4.5 | opus | 2025-11-24 | $5.00 |
| Claude Haiku 4.5 | haiku | 2025-10-15 | $1.00 |
| Claude Sonnet 4.5 | sonnet | 2025-09-29 | $3.00 |
| Claude Opus 4.1 | opus | 2025-08-05 | $15.00 |
| Claude Sonnet 4 | sonnet | 2025-05-22 | $3.00 |
| Claude Opus 4 | opus | 2025-05-22 | $15.00 |
| Claude 3.7 Sonnet | sonnet | 2025-02-24 | $3.00 |
| Claude 3.5 Haiku | haiku | 2024-11-04 | $0.80 |
| Claude 3.5 Sonnet | sonnet | 2024-06-20 | $3.00 |
| Claude 3 Opus | opus | 2024-03-04 | $15.00 |
| Claude 3 Sonnet | sonnet | 2024-03-04 | $3.00 |
| Claude 3 Haiku | haiku | 2024-03-04 | $0.25 |
Details
Model FamilyClaude
Tiermid
Generation2
Release Date2023-07-11
Context Window100K tokens
Open WeightNo
Modalitytext
Capabilities1
tool-use
Sources1
Tags
claudeclaude-2historical