Model Tracker

Claude 3 Opus

Claude 3 Opus is an AI model made by Anthropic. Anthropic released it on 4 March 2024. It is retired. Anthropic retired it on 5 January 2026.

In inglese

Anthropic

Claude 3 Opus is an AI model made by Anthropic. Anthropic released it on 4 March 2024. It is retired. Anthropic retired it on 5 January 2026. It takes text, image and returns text, code. Its context window is 200,000 tokens. Its knowledge cutoff is August 2023.

Released: 4 March 2024 — www.anthropic.com, read 16 October 2026
Status: Retired — platform.claude.com, read 16 October 2026
Retired: 5 January 2026 — platform.claude.com, read 16 October 2026
Takes: Text, Image — assets.anthropic.com, read 16 October 2026
Returns: Text, Code — www.anthropic.com, read 16 October 2026
Open weights: Not confirmed: The maker's cited pages do not state whether Claude 3 Opus has open weights.
Licence: Not confirmed: The maker's cited pages do not name a licence for Claude 3 Opus.
Context window: 200,000 tokens — www.anthropic.com, read 16 October 2026
Longest answer: Not confirmed: The maker's cited pages do not print Claude 3 Opus's standard maximum output-token limit.
Knowledge cutoff: August 2023 — support.claude.com, read 16 October 2026
API price, input: Not confirmed: The maker's current pricing page does not list Claude 3 Opus, so its standard input price as of 2026-10-16 is not confirmed there.
API price, output: Not confirmed: The maker's current pricing page does not list Claude 3 Opus, so its standard output price as of 2026-10-16 is not confirmed there.
Where: Not confirmed: The maker states that the model was retired from the Claude API, but the cited current pages do not confirm whether it remains available on any of the register's listed surfaces.
Parameters: Not confirmed: The maker's cited pages do not publish a parameter count for Claude 3 Opus.
Model card: https://assets.anthropic.com/m/61e7d27f8c8f5919/original/Claude-3-Model-Card.pdf — assets.anthropic.com, read 16 October 2026

Benchmarks

Measured by others, not by the maker: each score with the name the measurer gives the model and the setting it ran, its day and its licence.

Arena

Text Arena, claude-3-opus-20240229: 1,322 (1,319–1,325, 194,909 votes), published 15 October 2026
Vision Arena, claude-3-opus-20240229: 1,061 (1,051–1,072, 15,565 votes), published 9 October 2026

Arena’s leaderboard dataset (lmarena-ai/leaderboard-dataset on Hugging Face), CC BY 4.0: ratings from people’s votes between two anonymous models, as Arena publishes them. Data · CC BY 4.0

Epoch AI

Epoch Capabilities Index, Claude 3 Opus: 126.9 (121.8–129.8), as of 19 October 2026
GPQA Diamond, claude-3-opus-20240229: 47.2% (± 2.6), run 27 January 2025
OTIS Mock AIME 2024–2025, claude-3-opus-20240229: 4.7% (± 2.0), run 25 February 2025
SimpleQA Verified, claude-3-opus-20240229: 12.6% (± 1.0), run 31 August 2026

Epoch AI, ‘Capabilities & benchmarking’, epoch.ai/benchmarks, CC BY 4.0: Epoch AI’s own runs and its Capabilities Index. Data · CC BY 4.0

Questions

When was Claude 3 Opus released?

Anthropic released Claude 3 Opus on 4 March 2024.

Is Claude 3 Opus still available?

No: Anthropic retired Claude 3 Opus on 5 January 2026.

What is the context window of Claude 3 Opus?

The context window of Claude 3 Opus is 200,000 tokens, as Anthropic prints it.

What does Claude 3 Opus take and return?

Claude 3 Opus takes text, image and returns text, code.

What is the knowledge cutoff of Claude 3 Opus?

The knowledge cutoff of Claude 3 Opus is August 2023.

Sources

Introducing the next generation of Claude (read 16 October 2026)
Model deprecations (read 16 October 2026)
The Claude 3 Model Family: Opus, Sonnet, Haiku (read 16 October 2026)
How up-to-date is Claude's training data? (read 16 October 2026)
Pricing (read 16 October 2026)

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