Muse Spark 1.2 vs GPT-5.1
At a Glance
| Compare |  Muse Spark 1.2Meta |  GPT-5.1OpenAI |
|---|---|---|
| Intelligence, Cost, and Efficiency | ||
| IntelligenceHigher is better · MM Intelligence v2.5 | UnrankedNot in the 46-model eligible cohort | #37 of 4625.7 score · 2/3 sources · provisional · missing LiveBench · full-core range 17.1–50.5 |
| Pricing and Limits | ||
| Input priceFrom · USD / 1M tokens | Not reported | $1.25Openai ↗ · Sep 3, 2026 |
| Output priceFrom · USD / 1M tokens | Not reported | $10.00Openai ↗ · Sep 3, 2026 |
| Context windowMaximum documented tokens | Not reported | 400K |
| Model facts checked | Sep 3, 2026View model evidence → | Sep 3, 2026View model evidence → |
Token prices are the lowest available sourced USD rates; input and output may use different providers. Cost ranking estimates output spend on LiveBench, not a full request bill. Ranking methodology →
Available Benchmarks
| Benchmark | Muse Spark 1.2 | GPT-5.1 |
|---|---|---|
| LMArena Text Arenatext-2026-09-13-d25aabda0010 · arena_rating · leader | 1,489.44100% of row best · rating · muse-spark-1.2 (xHigh); 95% CI [1478.95697715, 1499.92080617]; votes 3227; rank 11 | 1,422.5796% of row best · rating · gpt-5.1; 95% CI [1418.95842118, 1426.18777801]; votes 42982; rank 100 |
| LMArena Vision Arenavision-2026-09-13-d25aabda0010 · arena_rating · leader | 1,303.88100% of row best · rating · muse-spark-1.2 (xHigh); 95% CI [1289.13624882, 1318.62565115]; votes 1841; rank 14 | 1,235.0895% of row best · rating · gpt-5.1; 95% CI [1227.35514387, 1242.80648733]; votes 10205; rank 65 |
| Overall ResultCounted from the protocol-matched rows above | 2 benchmark winsNo overall winner | 0 benchmark winsNo overall winner |
Third-party benchmark Only like-for-like primary-publisher results are shown; raw scores, relative scores, configuration, and token spend remain visible.
Side-by-Side Facts
| Field | Muse Spark 1.2 | GPT-5.1 |
|---|---|---|
| Developer | Meta | OpenAI |
| Family | Muse Spark | Gpt 5 1 |
| Model | Muse Spark 1.2 | GPT-5.1 |
| Version | Muse Spark 1.2 | GPT-5.1 |
| Lifecycle | preview | active |
| Released | 2026-08-05 | 2025-11-13 |
| Knowledge cutoff | Unknown | 2024-09-30 |
| Input modalities | Text, Image, Video, Audio | Text, Image |
| Output modalities | Text | Text |
| Context window | Unknown | 400K |
| Total parameters | Unknown | Unknown |
| Active parameters | Unknown | Unknown |
| License | Unknown | Unknown |
| Open weights | No | No |
| API available | Yes | Yes |
| Self-hostable | No | No |
| Provider access | Unknown | Openai (Standard), Openrouter (Standard) |
| Capabilities | chat, computer-use, generation, reasoning, research, structured_outputs, tools | chat, generation, reasoning, structured_outputs, tools |
Muse Spark 1.2 Capabilities
GPT-5.1 Capabilities
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Primary Evidence
Sources and Freshness
Questions
Muse Spark 1.2 vs GPT-5.1 FAQs
Is Muse Spark 1.2 or GPT-5.1 better for coding?+
This comparison does not currently contain a protocol-matched coding benchmark for both Muse Spark 1.2 and GPT-5.1, so Model Markets cannot name a coding leader from pricing, context size, or capability labels alone.
Which is cheaper, Muse Spark 1.2 or GPT-5.1?+
Only GPT-5.1 has a directly sourced input price: $1.25 per million tokens. Only GPT-5.1 has a directly sourced output price: $10.00 per million tokens.
Which has a larger context window, Muse Spark 1.2 or GPT-5.1?+
Neither model has a larger sourced context window in this comparison. Muse Spark 1.2 is — and GPT-5.1 is 400K.
Which performs better in benchmarks, Muse Spark 1.2 or GPT-5.1?+
There is no overall benchmark winner: An overall winner requires at least two decisive benchmarks from at least two original publishers.
Can Muse Spark 1.2 or GPT-5.1 be self-hosted?+
Both models have the same recorded self-hosting status: unsupported. Muse Spark 1.2 is not marked open weight; GPT-5.1 is not marked open weight.
Can Muse Spark 1.2 and GPT-5.1 understand images?+
Muse Spark 1.2 is documented with image input; GPT-5.1 is documented with image input. This reflects supported input modalities, not vision quality.
Which can generate longer answers, Muse Spark 1.2 or GPT-5.1?+
Neither has a larger sourced maximum output. Muse Spark 1.2 is — and GPT-5.1 is 128K.
Do Muse Spark 1.2 and GPT-5.1 support reasoning and tool use?+
Muse Spark 1.2: reasoning, tool calling, and image input. GPT-5.1: reasoning, tool calling, and image input. Feature support does not establish relative quality.
Which is available from more inference providers, Muse Spark 1.2 or GPT-5.1?+
Muse Spark 1.2 has 0 sourced provider routes; GPT-5.1 has 2, so GPT-5.1 has broader tracked availability.
Which offers better value, Muse Spark 1.2 or GPT-5.1?+
There is no universal value winner. Compare the input and output prices above with the matched benchmark result for your workload: cheaper tokens can be offset by different quality, token usage, latency, or provider availability.