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Anthropic's Opus 5.5 handles 6.4M tokens in single prompt test

By PulseAugur Editorial · [1 sources] ·

A user on Reddit shared their experience using Anthropic's Opus 5.5 model for an extensive "pelican test." This test involved a single prompt and consumed approximately 6.4 million tokens, representing about an hour of work. The user's post on the r/ClaudeAI subreddit details this large-scale interaction with the AI. AI

IMPACT Demonstrates the practical application and context window limits of advanced AI models in real-world usage scenarios.

RANK_REASON User-conducted test of an AI model's capability, not an official release or benchmark. [lever_c_demoted from research: ic=1 ai=1.0]

Read on r/ClaudeAI →

AI-generated summary · Google Gemini · from 1 sources. How we write summaries →

Anthropic's Opus 5.5 handles 6.4M tokens in single prompt test

How we ranked this

Signal score
4 / 100
Composite score across the factors below. Higher = stronger signal that this story matters right now.
Newsworthiness bucket
Tool
User-conducted test of an AI model's capability, not an official release or benchmark. [lever_c_demoted from research: ic=1 ai=1.0]
Source corroboration
Single-source cluster
Only one publisher covered this so far. Single-source stories can still rank when the publisher is high-authority, but they lack cross-source corroboration.
Topics
model release
Editorial topic classification. Feeds into how the story surfaces on /topic/<slug> hub pages and into the per-entity coverage mix.
AI-industry relevance
High
Clearly on-topic for AI-industry coverage.
Story freshness
Breaking (< 6h)
Fresh story with cross-source coverage still developing. Ranking may shift as more sources report.

Full methodology in our editorial standards.

COVERAGE [1]

  1. r/ClaudeAI TIER_2 English(EN) · /u/Dacadey ·

    The ultimate pelican test (Opus 5.5 max)

    <table> <tr><td> <a href="https://www.reddit.com/r/ClaudeAI/comments/1wwzi3q/the_ultimate_pelican_test_opus_55_max/"> <img alt="The ultimate pelican test (Opus 5.5 max)" src="https://external-preview.redd.it/Z20zdWNuM250YnRoMU_brdQSJsvG5PbRC9tNOaby4jcBRfx9EZ_iCu-_t9PQ.png?width=6…

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