Muse Spark 1.1 vs Grok 4.5
At a Glance
| Compare |  Muse Spark 1.1Meta | Grok 4.5xAI |
|---|---|---|
| Intelligence, Cost, and Efficiency | ||
| IntelligenceHigher is better · MM Intelligence v2.5 | UnrankedNot in the 46-model eligible cohort | #25 of 4660.1 score · 3/3 sources · complete |
| CostLower is better · Published-token output estimate | UnrankedNot in the 44-model eligible cohort | #15 of 44$0.063 per LiveBench case |
| EfficiencyHigher is better · MM Efficiency v1.5 | UnrankedNot in the 38-model eligible cohort | #11 of 3859.2 score · 3/3 sources · complete |
| Pricing and Limits | ||
| Input priceFrom · USD / 1M tokens | Not reported | $2.00Xai ↗ · Sep 3, 2026 |
| Output priceFrom · USD / 1M tokens | Not reported | $6.00Xai ↗ · Sep 3, 2026 |
| Context windowMaximum documented tokens | 1,000K | 500K |
| 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 1.1 | Grok 4.5 |
|---|---|---|
| LMArena Agent Arenaagent-2026-09-15-d25aabda0010 · outcome_score · leader | -2.9894% of row best · score · Muse Spark 1.1; 95% CI [-3.52464364, -2.43839720]; sessions 109338; observations 4434474; rank 33 | 2.92100% of row best · score · Grok 4.5; 95% CI [1.93207740, 3.90928463]; sessions 38146; observations 1942877; rank 19 |
| LMArena Document Arenadocument-2026-09-13-d25aabda0010 · arena_rating · statistical tie | 1,464.70100% of row best · rating · muse-spark-1.1; 95% CI [1455.86175356, 1473.53929177]; votes 4885; rank 18 | 1,451.9699% of row best · rating · grok-4.5; 95% CI [1443.26182849, 1460.65626012]; votes 4965; rank 26 |
| LMArena Text Arenatext-2026-09-13-d25aabda0010 · arena_rating · leader | 1,480.17100% of row best · rating · muse-spark-1.1; 95% CI [1475.34892554, 1484.99642998]; votes 27615; rank 15 | 1,450.1398% of row best · rating · grok-4.5; 95% CI [1445.44268767, 1454.81726995]; votes 30103; rank 45 |
| LMArena Vision Arenavision-2026-09-13-d25aabda0010 · arena_rating · statistical tie | 1,294.16100% of row best · rating · muse-spark-1.1; 95% CI [1286.17018729, 1302.15601223]; votes 8447; rank 21 | 1,288.54100% of row best · rating · grok-4.5; 95% CI [1280.47745270, 1296.60872281]; votes 8355; rank 24 |
| LiveBench2026-06-25 · overall · leader | 78.5798% of row best · percent · muse-spark-1.1-xhigh · 13,652 output tokens / case | 80.01100% of row best · percent · grok-4.5 · 10,517 output tokens / case |
| ToneBench2026-09-11-10-task-4ef099199c9c · overall_score · unverified | 80.7698% of row best · points · Muse Spark 1.1 (thinking) · 6,037 output tokens / case | 82.23100% of row best · points · Grok 4.5 · 2,688 output tokens / case |
| Overall ResultCounted from the protocol-matched rows above · 2 ties | 1 benchmark win | 2 benchmark winsOverall lead |
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 1.1 | Grok 4.5 |
|---|---|---|
| Developer | Meta | xAI |
| Family | Muse Spark | Grok 4 |
| Model | Muse Spark 1.1 | Grok 4.5 |
| Version | Muse Spark 1.1 | Grok 4.5 |
| Lifecycle | preview | active |
| Released | 2026-07-09 | 2026-07-16 |
| Knowledge cutoff | Unknown | Unknown |
| Input modalities | Text, Image, Video, Audio | Text, Image |
| Output modalities | Text | Text |
| Context window | 1,000K | 500K |
| 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 | Xai (Standard) |
| Capabilities | chat, computer-use, generation, reasoning, research, structured_outputs, tools | chat, generation, reasoning, structured_outputs, tools |
Muse Spark 1.1 Capabilities
Grok 4.5 Capabilities
Related Comparisons
All image comparisons →| A | Pair | B | Context |
|---|---|---|---|
Muse Spark 1.1Meta | vs |  GPT-6 AstraOpenAI | cross-developer peersimage, text |
Claude Fable 5.1Anthropic | vs | Muse Spark 1.1Meta | cross-developer peersimage, text |
 Gemini 3.1 ProGoogle DeepMind | vs | Muse Spark 1.1Meta | cross-developer peerstext |
 DeepSeek-V4.1-FlashDeepSeek | vs | Muse Spark 1.1Meta | cross-developer peersimage, text |
Muse Spark 1.1Meta | vs | Grok 4.6xAI | cross-developer peersimage, text |
Muse Spark 1.1Meta | vs |  Qwen3.8-MaxQwen | cross-developer peersimage, text, video |
Muse Spark 1.1Meta | vs |  Kimi-K3Moonshot AI | cross-developer peersimage, text |
 MiniMax-M3MiniMax | vs | Muse Spark 1.1Meta | cross-developer peersimage, text |
Muse Spark 1.1Meta | vs |  GLM-5.3Z.ai | cross-developer peerstext |
Muse Spark 1.1Meta | vs |  Hy4 previewTencent | cross-developer peerstext |
Seed 2.1 ProByteDance Seed | vs | Muse Spark 1.1Meta | cross-developer peersimage, text, video |
Muse Spark 1.1Meta | vs |  Mistral Large 3Mistral AI | cross-developer peersimage, text |
Primary Evidence
Sources and Freshness
Questions
Muse Spark 1.1 vs Grok 4.5 FAQs
Is Muse Spark 1.1 or Grok 4.5 better for coding?+
This comparison does not currently contain a protocol-matched coding benchmark for both Muse Spark 1.1 and Grok 4.5, so Model Markets cannot name a coding leader from pricing, context size, or capability labels alone.
Which is cheaper, Muse Spark 1.1 or Grok 4.5?+
Only Grok 4.5 has a directly sourced input price: $2.00 per million tokens. Only Grok 4.5 has a directly sourced output price: $6.00 per million tokens.
Which has a larger context window, Muse Spark 1.1 or Grok 4.5?+
Muse Spark 1.1 has the larger sourced context window. Muse Spark 1.1 supports 1,000K and Grok 4.5 supports 500K.
Which performs better in benchmarks, Muse Spark 1.1 or Grok 4.5?+
Grok 4.5 leads the current overall benchmark count. The result uses 5 protocol-matched benchmarks from 2 publishers; it is not a universal quality score.
Can Muse Spark 1.1 or Grok 4.5 be self-hosted?+
Both models have the same recorded self-hosting status: unsupported. Muse Spark 1.1 is not marked open weight; Grok 4.5 is not marked open weight.
Can Muse Spark 1.1 and Grok 4.5 understand images?+
Muse Spark 1.1 is documented with image input; Grok 4.5 is documented with image input. This reflects supported input modalities, not vision quality.
Which can generate longer answers, Muse Spark 1.1 or Grok 4.5?+
Neither has a larger sourced maximum output. Muse Spark 1.1 is — and Grok 4.5 is —.
Do Muse Spark 1.1 and Grok 4.5 support reasoning and tool use?+
Muse Spark 1.1: reasoning, tool calling, and image input. Grok 4.5: reasoning, tool calling, and image input. Feature support does not establish relative quality.
Which is available from more inference providers, Muse Spark 1.1 or Grok 4.5?+
Muse Spark 1.1 has 0 sourced provider routes; Grok 4.5 has 1, so Grok 4.5 has broader tracked availability.
Which offers better value, Muse Spark 1.1 or Grok 4.5?+
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.