--- title: GPT-5.6 SOL,TERRA,LUNA (Fully Tested): I GOT EARLY... description: OpenAI has begun a limited preview of the GPT-5.6 series, featuring three models: Soul (flagship), Terra (balanced), and Luna (fast/cheap). Early benchmark... canonical: https://daily.dev/posts/gpt-5-6-sol-terra-luna-fully-tested-i-got-early-access-here-s-my-thoughts--jf1cizfku twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: GPT-5.6 SOL,TERRA,LUNA (Fully Tested): I GOT EARLY ACCESS & Here's my thoughts. | daily.dev og:description: OpenAI has begun a limited preview of the GPT-5.6 series, featuring three models: Soul (flagship), Terra (balanced), and Luna (fast/cheap). Early benchmark... og:url: https://daily.dev/posts/gpt-5-6-sol-terra-luna-fully-tested-i-got-early-access-here-s-my-thoughts--jf1cizfku og:image: https://api.daily.dev/og/posts/JF1CiZfkU.png og:image:alt: GPT-5.6 SOL,TERRA,LUNA (Fully Tested): I GOT EARLY ACCESS & Here's my thoughts. og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # GPT-5.6 SOL,TERRA,LUNA (Fully Tested): I GOT EARLY ACCESS & Here's my thoughts. **[AICodeKing](https://daily.dev/sources/aicodeking)** · 5 min read · 0 upvotes · 0 comments ## Summary OpenAI has begun a limited preview of the GPT-5.6 series, featuring three models: Soul (flagship), Terra (balanced), and Luna (fast/cheap). Early benchmark testing across frontend tasks, math, SVG generation, and agentic long-horizon tasks shows Soul scoring 78.6% on a custom benchmark — a near-doubling of GPT-5.5's score. All three models excelled at agentic and backend tasks, matching top competitors, but underperformed on frontend/visual work. Pricing is competitive: Soul at $5/$30 per million tokens, Terra at $2.50/$15, and Luna at $1/$6. The reviewer considers this a strong incremental improvement over GPT-5.5 rather than a paradigm shift, with Anthropic's Fable still leading overall but Soul closing the gap significantly, especially for backend and agentic use cases at lower cost. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: --- Tags: [#llm](https://daily.dev/tags/llm), [#openai](https://daily.dev/tags/openai), [#gpt](https://daily.dev/tags/gpt), [#agentic-ai](https://daily.dev/tags/agentic-ai) [View this post on daily.dev](https://daily.dev/posts/gpt-5-6-sol-terra-luna-fully-tested-i-got-early-access-here-s-my-thoughts--jf1cizfku) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"GPT-5.6 SOL,TERRA,LUNA (Fully Tested): I GOT EARLY ACCESS & Here's my thoughts.","url":"https://daily.dev/posts/gpt-5-6-sol-terra-luna-fully-tested-i-got-early-access-here-s-my-thoughts--jf1cizfku","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/gpt-5-6-sol-terra-luna-fully-tested-i-got-early-access-here-s-my-thoughts--jf1cizfku"},"datePublished":"2026-07-09T09:24:25.916Z","dateModified":"2026-07-09T09:25:37.886Z","description":"OpenAI has begun a limited preview of the GPT-5.6 series, featuring three models: Soul (flagship), Terra (balanced), and Luna (fast/cheap). 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