Claude 2.1

Anthropic

Claude 2.1 by Anthropic costs — per 1M input tokens and — per 1M output tokens, with a —-token context window.

Pricing

Input (per 1M tokens)

—

Output (per 1M tokens)

—

Cached input (per 1M)

—

Specifications

Provider: Anthropic
Context window: —
Parameters: —
Released: Nov 2023
Open weights: No
Frontier model: No

Benchmarks

Epoch Capabilities Index: 119.3
GPQA Diamond: 33.0

Compare Claude 2.1 with…

Claude 2.1 vs Anthropic: Claude Opus 4.8$25.00/1M Claude 2.1 vs Anthropic: Claude Opus 4.8 (Fast)$50.00/1M Claude 2.1 vs Claude Opus 4.5 (latest)$25.00/1M Claude 2.1 vs Claude Opus 4 (latest)$75.00/1M Claude 2.1 vs Claude Opus 3$75.00/1M Claude 2.1 vs Claude Sonnet 3.5 v2$15.00/1M

FAQ

How much does Claude 2.1 cost?

Claude 2.1 is priced at — per 1M input tokens and — per 1M output tokens. Output tokens cost more than input.

What is Claude 2.1's context window?

Claude 2.1 supports a context window of — tokens — the maximum prompt plus response length it can handle in a single request.

Is Claude 2.1 open weight?

No — Claude 2.1 is a closed/proprietary model accessed via API.

Data as of 2026-10-14. Source: Epoch AI, Data on AI Models (CC BY 4.0), epoch.ai. Pricing is per 1M tokens (USD); confirm with the provider before production use.