GPT-5.6 Luna vs Claude Opus 5.5
Compare GPT-5.6 Luna and Claude Opus 5.5 side-by-side. See comparisons of price, response speed, accuracy, and file support to choose the best model for your task.
Overview
GPT-5.6 Luna vs Claude Opus 5.5 Overview
Everything you need to know about these AI models, including capabilities, performance, pricing, and technical details.
OpenAI / GPT-5.6 Luna
maxDescription
OpenAI's fastest and cheapest GPT-5.6 model, built for high-volume, latency-sensitive work. Luna handles quick edits, first-pass drafts, and simple pages at a low cost, matching the nano tier of earlier GPT generations. It shares the family's very large context, recent knowledge, and text-and-image input, and supports the same reasoning range and web search, so it is capable well beyond its price.
Anthropic / Claude Opus 5.5
maxDescription
Anthropic's newest flagship, and the first in its Claude 5.5 family. Anthropic positions Opus 5.5 to perform at the level of its most capable model on most work, while costing meaningfully less to run than the previous Opus. It reads text and images, holds a very large context, and reasons before every answer with adjustable effort. Anthropic calls it their daily driver for serious coding, computer use, and knowledge work, with its knowledge current to mid-2026.
About
About
Capabilities
Capabilities
Comparison
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OpenAI / GPT-5.6 Luna
maxFast Cheap Coding
Built for quick edits, first-pass drafts, and simple pages at high volume. Best on well-scoped, verifiable coding work where speed and low cost matter more than tackling the hardest problems.
Reasoning Effort You Set
Shares the family's full reasoning-effort range, from none up to the highest settings. Runs shallow and fast by default, with room to push harder when a task genuinely needs it.
Room For Long Inputs
The same very large context window as its larger siblings. Big enough to summarise long documents or process large batches in one pass, unusual capacity for a model at this price.
High-Volume Drafting
OpenAI positions it for cost-sensitive, high-volume workloads. Suited to first drafts, quick rewrites, and repetitive text work at scale rather than polished long-form or high-stakes writing.
Web Search And Recent Knowledge
Supports web search as a tool and shares the family's recent knowledge base. Together, those keep it current on live questions despite its budget positioning.
Text And Image Input
Reads text and images in the same prompt, so you can send screenshots or scanned pages alongside your question. Output is text only. Audio and video are not accepted.
Anthropic / Claude Opus 5.5
maxDaily-Driver Coding
Anthropic positions it as its everyday model for serious coding and agentic work, reaching its most capable model's level on most tasks. Built for real software engineering across many steps rather than isolated snippets.
Adaptive Thinking Always On
Reasoning is always on, with an effort dial rather than an off switch, defaulting to medium. Anthropic reports medium effort here, matching the previous Opus at high, so it thinks efficiently rather than at length.
Room For Whole Projects
A very large context window with no smaller default. Anthropic reports stronger long-context management, so instruction following and reasoning hold across a full codebase or a long agent run.
Precise Document Work
Anthropic's strongest Opus for vision and document work: dense filings, charts, screenshots, and diagrams read at high fidelity. It also writes more concisely than the previous Opus, a deliberate change.
Deep Computer Use
Anthropic reports that its best Opus is for computer use, handling multi-step tasks that span several applications and require planning and judgment. Suited to agentic work that operates real software, not just answering questions.
Text And Image Input
Reads text, images, and PDFs in the same prompt, so you can send screenshots, filings, diagrams, or charts alongside your question. Output is text only. Audio and video are not accepted.
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Why chat with GPT-5.6 Luna and Claude Opus 5.5 on Aymo AI?
Aymo gives you more than access to GPT-5.6 Luna and Claude Opus 5.5—it provides a complete multi-model AI workspace designed for productivity.
Compare Responses
See how GPT-5.6 Luna and Claude Opus 5.5 performs alongside Claude, Gemini, Grok, and other leading AI models.
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