--- title: GPT-6 Astra (Fully Tested & Side by Side comparison with... description: A hands-on comparison pits GPT-6 Astra against Fable 5.1 across eight Kingbench 3 coding tests and four larger app builds. Astra scores 90% (third on the... canonical: https://daily.dev/posts/gpt-6-astra-fully-tested-side-by-side-comparison-with-fable-5-1-one-is-a-clear-winner--r2zgvql3a twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: GPT-6 Astra (Fully Tested & Side by Side comparison with Fable 5.1): ONE is a CLEAR WINNER! | daily.dev og:description: A hands-on comparison pits GPT-6 Astra against Fable 5.1 across eight Kingbench 3 coding tests and four larger app builds. Astra scores 90% (third on the... og:url: https://daily.dev/posts/gpt-6-astra-fully-tested-side-by-side-comparison-with-fable-5-1-one-is-a-clear-winner--r2zgvql3a og:image: https://api.daily.dev/og/posts/r2zgVqL3A.png og:image:alt: GPT-6 Astra (Fully Tested & Side by Side comparison with Fable 5.1): ONE is a CLEAR WINNER! 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-6 Astra (Fully Tested & Side by Side comparison with Fable 5.1): ONE is a CLEAR WINNER! **[AICodeKing](https://daily.dev/sources/aicodeking)** · 11 min read · 0 upvotes · 0 comments ## Summary A hands-on comparison pits GPT-6 Astra against Fable 5.1 across eight Kingbench 3 coding tests and four larger app builds. Astra scores 90% (third on the leaderboard) versus Fable's 92.5% (first), but the gap widens dramatically on bigger, real-world projects: Astra's terminal movie tracker had broken TMDB integration and flickering, and its Obsidian clone shipped with a non-functional agent, while Fable succeeded at both. Astra also cost about $198 in tokens versus $113 for Fable, ran slower, leaned toward generic green grid-layout aesthetics, and over-complicated simple requests. The reviewer concludes Fable 5.1 remains their preferred daily driver despite Astra's strong individual test wins (folding table, panda SVG, wristwatch) and competitive benchmark score. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### How does GPT-6 Astra compare to Fable 5.1 on coding benchmarks and larger app builds? GPT-6 Astra scored 90% on Kingbench 3 (third place) versus Fable 5.1's 92.5% (first place), a two-point gap across eight tests. On four larger real-world app builds, Fable won two clearly, tied one, and won one by a small margin, while Astra had a broken TMDB integration in a terminal app and a non-functional agent in an Obsidian clone. _daily.dev helps developers compare AI coding models before betting a project's budget on one._ ### How much does GPT-6 Astra cost compared to Fable 5.1 for coding tasks? Testing GPT-6 Astra through Codex with Ultra Thinking cost about $198 in tokens, roughly 75% more than the $113 spent testing Fable 5.1 through Verdant. These are token costs for specific test runs, not monthly subscription prices, and actual spend depends on agent setup and thinking level. _developers weighing token costs across AI coding tools can track pricing shifts on daily.dev._ ### What are common criticisms of GPT-6 Astra's coding output and design choices? GPT-6 Astra tends toward a familiar grid-layout, green-tinted aesthetic reminiscent of older GPT models, often turns simple requests into landing pages, over-complicates simple tasks, calls tools eagerly even for casual chat, and runs slower than Fable 5.1 on comparable tasks according to hands-on testing. _daily.dev keeps developers current on real-world quirks of AI coding assistants before they commit to one._ --- Tags: [#ai](https://daily.dev/tags/ai), [#ai-coding](https://daily.dev/tags/ai-coding), [#vibe-coding](https://daily.dev/tags/vibe-coding) [View this post on daily.dev](https://daily.dev/posts/gpt-6-astra-fully-tested-side-by-side-comparison-with-fable-5-1-one-is-a-clear-winner--r2zgvql3a) ```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-6 Astra (Fully Tested & Side by Side comparison with Fable 5.1): ONE is a CLEAR WINNER!","url":"https://daily.dev/posts/gpt-6-astra-fully-tested-side-by-side-comparison-with-fable-5-1-one-is-a-clear-winner--r2zgvql3a","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/gpt-6-astra-fully-tested-side-by-side-comparison-with-fable-5-1-one-is-a-clear-winner--r2zgvql3a"},"datePublished":"2026-09-05T12:05:46.953Z","dateModified":"2026-09-05T12:06:46.442Z","description":"A hands-on comparison pits GPT-6 Astra against Fable 5.1 across eight Kingbench 3 coding tests and four larger app builds. 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