Compare · ModelsLive · 2 picked · head to head
GPT-5.6 Terra vs Muse Spark Open
Side by side · benchmarks, pricing, and signals you can act on.
Winner summary
GPT-5.6 Terra wins on 7/8 benchmarks
GPT-5.6 Terra wins 7 of 8 shared benchmarks. Leads in agentic · reasoning · math.
Category leads
agentic·GPT-5.6 Terrareasoning·GPT-5.6 Terramath·GPT-5.6 Terraknowledge·GPT-5.6 Terra
Hype vs Reality
Attention vs performance
GPT-5.6 Terra
#37 by perf·#9 by attention
Muse Spark Open
#35 by perf·no signal
Best value
Muse Spark Open
2.6x better value than GPT-5.6 Terra
GPT-5.6 Terra
9.4 pts/$
$7.00/M
Muse Spark Open
24.0 pts/$
$2.75/M
Vendor risk
Who is behind the model
OpenAI
$840.0B·Tier 1
Meta AI
$1.65T·Tier 1
Head to head
8 benchmarks · 2 models
GPT-5.6 TerraMuse Spark Open
APEX-Agents
GPT-5.6 Terra leads by +24.8
APEX-Agents · evaluates AI agents on complex, multi-step tasks requiring planning, tool use, and autonomous decision-making in realistic environments.
GPT-5.6 Terra
58.2
Muse Spark Open
33.4
ARC-AGI
GPT-5.6 Terra leads by +7.5
ARC-AGI · the original Abstraction and Reasoning Corpus, testing whether AI can solve novel visual pattern recognition tasks without memorization.
GPT-5.6 Terra
96.5
Muse Spark Open
89.0
ARC-AGI-2
GPT-5.6 Terra leads by +26.4
ARC-AGI-2 · the second iteration of the Abstraction and Reasoning Corpus, testing novel pattern recognition and abstract reasoning without prior training data.
GPT-5.6 Terra
83.9
Muse Spark Open
57.5
FrontierMath-Tier-4-v2-Private
GPT-5.6 Terra leads by +39.0
GPT-5.6 Terra
70.7
Muse Spark Open
31.7
FrontierMath-Tiers-1-3-v2-Private
GPT-5.6 Terra leads by +17.0
GPT-5.6 Terra
90.5
Muse Spark Open
73.5
GPQA diamond
GPT-5.6 Terra leads by +6.6
Graduate-Level Google-Proof QA (Diamond set) · expert-crafted questions in physics, biology, and chemistry that are difficult even for domain PhDs.
GPT-5.6 Terra
94.9
Muse Spark Open
88.3
OTIS Mock AIME 2024-2025
GPT-5.6 Terra leads by +1.7
OTIS Mock AIME 2024-2025 · simulated American Invitational Mathematics Examination problems testing advanced problem-solving skills.
GPT-5.6 Terra
99.7
Muse Spark Open
98.0
SimpleQA Verified
Muse Spark Open leads by +13.4
SimpleQA Verified · short factual questions with verified answers, measuring factual accuracy and the tendency to hallucinate or provide incorrect information.
GPT-5.6 Terra
43.2
Muse Spark Open
56.6
Full benchmark table
| Benchmark | GPT-5.6 Terra | Muse Spark Open |
|---|---|---|
APEX-Agents APEX-Agents · evaluates AI agents on complex, multi-step tasks requiring planning, tool use, and autonomous decision-making in realistic environments. | 58.2 | 33.4 |
ARC-AGI ARC-AGI · the original Abstraction and Reasoning Corpus, testing whether AI can solve novel visual pattern recognition tasks without memorization. | 96.5 | 89.0 |
ARC-AGI-2 ARC-AGI-2 · the second iteration of the Abstraction and Reasoning Corpus, testing novel pattern recognition and abstract reasoning without prior training data. | 83.9 | 57.5 |
FrontierMath-Tier-4-v2-Private | 70.7 | 31.7 |
FrontierMath-Tiers-1-3-v2-Private | 90.5 | 73.5 |
GPQA diamond Graduate-Level Google-Proof QA (Diamond set) · expert-crafted questions in physics, biology, and chemistry that are difficult even for domain PhDs. | 94.9 | 88.3 |
OTIS Mock AIME 2024-2025 OTIS Mock AIME 2024-2025 · simulated American Invitational Mathematics Examination problems testing advanced problem-solving skills. | 99.7 | 98.0 |
SimpleQA Verified SimpleQA Verified · short factual questions with verified answers, measuring factual accuracy and the tendency to hallucinate or provide incorrect information. | 43.2 | 56.6 |
Pricing · per 1M tokens · projected $/mo at 10M tokens
| Model | Input | Output | Context | Projected $/mo |
|---|---|---|---|---|
| $2.00 | $12.00 | 1.1M tokens (~525 books) | $45.00 | |
| $1.25 | $4.25 | 1.0M tokens (~524 books) | $20.00 |
People also compared