Claude 5.5: choose Opus, Sonnet or Haiku for the marketing task
The right choice of model depends on the difficulty of the file, the volume and the level of control expected. Organize a business test before turning a performance announcement into a purchase rule.
7 October 2026 — Haiku's arrival in the family 5.5. Documented recapture: the date of the facts is separate from the date of publication of this section.
Article prepared with artificial intelligence assistance. The sources and method are indicated in the text.
In this folder
Remark of the announcement: 7 October 2026 — Haiku's arrival in the family 5.5. Retrospective written on 2 November 2026; the dates of launch and publication are distinct.
The right choice of model depends on the difficulty of the file, the volume and the level of control expected. Organize a business test before turning a performance announcement into a purchase rule.
What was announced in 2026
Anthropic presents Opus 5.5 on September 22, Sonnet 5.5 on September 28, then Haiku 5.5 on October 7. The publisher positions these models on different balances between complexity, speed and volume. These are the checked benchmarks of this family as of November 2, 2026. Comparisons published by the supplier do not replace an evaluation on your team's files.
Separate three levels of work
A summary of the report, a comparative table and a strategic recommendation do not require the same effort. In the first case, faithful restitution dominates. In the second, the rules of reconciliation and units are essential. In the third, the team must examine hypotheses, contradictions and choices. Described this difference allows to assign tasks rather than asking the most powerful model to treat everything without distinction.
Build a small agency test bench
Keep three anonymous or fictitious files: an incomplete brief, a distribution table and a set of conflicting sources. Set the expected deliverables, the necessary elements and the playoffs errors. Then compare the results to a common grid. The model must know how to identify missing information, keep the numbers and separate what it knows from what it proposes. The quality of a fluid text is not sufficient to judge the reliability of the work.
The cost of the validated result
The response time is an element of the balance sheet, and the preparation, re-runs, search for evidence and validation are also important. A quick result that requires a long correction can cost more in production. Conversely, a simple and well-documented task can be entrusted to a lighter solution. Prices, limits and access change: the internal estimate must keep its date and scope of comparison.
The checkpoint for the Maghreb
The language and documents actually used: French, Arabic, multicurrency tables and local sources are entered in the test. A general capacity announced does not prove the accuracy of a register or market reading. The conclusions intended for the customer must remain linked to the documents checked. The file manager maintains the final decision on the message, interpretation and recommendation.
Sources and method
The recommendations and grids of this article are proposed by Le Fils de Pub. The constructed examples are indicated; the advertisements and results attributed to an organization remain those of this source. Article prepared with artificial intelligence assistance.
Continue with a practical method
Suggested routes from the story to briefing, production or measurement. These features are separate from the original publication.