Muse Spark 1.2vsGPT-5.4 mini
Muse Spark 1.2 | GPT-5.4 mini | |
|---|---|---|
| Specifications | ||
Context window | 1M | 400k |
| Benchmarks | ||
Nonsense detection BullshitBench v2Given a confidently-worded but nonsensical prompt, does the AI spot that it makes no sense and push back — instead of playing along and inventing an answer? The score is how often it clearly called out the nonsense. Higher is better. | — | 32% |
Agentic coding DeepSWE 1.1Artificial Analysis' independent test of deep, agentic software-engineering work — the AI has to plan and carry out substantial coding tasks end to end. (Version 1.1 of the test.) Higher is better. | 59.3% | — |
Supabase coding Supabase Evals · with skillsSupabase's own open benchmark: a coding agent is dropped into a real Supabase project and asked to do real work — set up a schema, fix a broken security policy, debug an Edge Function — and every run is checked against a live Supabase stack. This is the headline number, where the agent has Supabase's own skills loaded, as most people building on Supabase would. The score is the share of scenarios it got right. Higher is better. | — | 78.9% |
Supabase coding Supabase Evals · no skillsThe same Supabase scenarios, but with none of Supabase's skills loaded — so it measures what the model already knows about building on Supabase, rather than how well it follows Supabase's supplied instructions. Higher is better. | — | 73.7% |
Agentic terminal coding Terminal-Bench 2.1Can the AI work in a command-line terminal — running commands and finishing technical setup tasks the way a developer would? Higher is better. | 82.9% | — |
Browser agent BU BenchCan the AI drive a real web browser to finish tasks — clicking, filling forms, and navigating sites the way a person would? Run by Browser Use on their BU Bench task set. Higher is better. | — | 36% |
Community preference (code) Arena Elo (Code)Like the text arena, but people vote on which AI writes better code. The votes become a chess-style Elo rating on arena.ai. Higher is better. | — | 1398 |
| Overview | ||
| Company | Meta | OpenAI |
| Release date | Aug 5 2026 | Mar 17 2026 |
| Access | Proprietary | Proprietary |
Which is better: Muse Spark 1.2 or GPT-5.4 mini?
Muse Spark 1.2 and GPT-5.4 mini don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. GPT-5.4 mini shipped 141 days before Muse Spark 1.2, so benchmark comparisons should account for the intervening progress.
Context windows are 1M (Muse Spark 1.2) vs 400k (GPT-5.4 mini).
Direct benchmark comparisons are unavailable — Muse Spark 1.2 and GPT-5.4 mini don't publish scores on any of the same benchmarks.
Frequently asked questions
Muse Spark 1.2 was released by Meta on Aug 5 2026.
GPT-5.4 mini was released by OpenAI on Mar 17 2026.
Muse Spark 1.2 has a 1M context window; GPT-5.4 mini has 400k.
Other comparisons
Muse Spark 1.2vsClaude Opus 5GPT-5.4 minivsClaude Opus 5Muse Spark 1.2vsGemini 3.6 FlashGPT-5.4 minivsGemini 3.6 FlashMuse Spark 1.2vsGrok 4.5GPT-5.4 minivsGrok 4.5Muse Spark 1.2vsDeepSeek-V4-Flash-0731GPT-5.4 minivsDeepSeek-V4-Flash-0731Muse Spark 1.2vsMistral Medium 3.5GPT-5.4 minivsMistral Medium 3.5Muse Spark 1.2vsKimi K3GPT-5.4 minivsKimi K3