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GPT-6.1 Terra vs Muse Spark 1.3

GPT-6.1 Terra and Muse Spark 1.3 are closely matched at 47.5 and 51.9 on the LLM Stats Score. GPT-6.1 Terra and Muse Spark 1.3 cost the same.

OpenAI · Meta · Updated for 2026

Which is better?

GPT-6.1 Terra and Muse Spark 1.3 are closely matched on the overall LLM Stats Score at 47.5 and 51.9.

GPT-6.1 Terra also accepts a larger context window (1,050,000 input tokens), making it the stronger choice for long documents and large codebases.

Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.

Choose GPT-6.1 Terra

  • you process long inputs — it offers a 1,050,000 token context window
  • you want the most recent training data — it shipped Oct 2026

Choose Muse Spark 1.3

  • you want predictable pricing at $1.25/M input and $4.25/M output

At a glance

The differences that matter most.

GPT-6.1 Terra
OpenAI
Muse Spark 1.3
Meta
Core performance indexes
LLM Stats Score
47.5
#36
51.9
#15
Reasoning
49.0
#19
50.3
#14
Coding
37.1
#30
38.6
#26
Agents
38.8
#12
37.9
#18
Cost, coverage & limits
Benchmark wins
—
—
Input price
$1.00 / M
$1.25 / M
Output price
$5.00 / M
$4.25 / M
Context window
1,050,000
1,048,576

Capability indexes

Additional strengths measured across groups of related public benchmarks

1 shared
Index
GPT-6.1 Terra
Muse Spark 1.3
Tool use
33.3#5
31.1#10
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

8 reported for GPT-6.1 Terra · 11 for Muse Spark 1.3

No common benchmarks found

GPT-6.1 Terra and Muse Spark 1.3don't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Human preference

Blind head-to-head votes and playground preference scores

Pricing Analysis

Price comparison per million tokens

For input processing, GPT-6.1 Terra ($1.00/1M tokens) is 1.3x cheaper than Muse Spark 1.3 ($1.25/1M tokens).

For output processing, GPT-6.1 Terra ($5.00/1M tokens) is 1.2x more expensive than Muse Spark 1.3 ($4.25/1M tokens).

In conclusion, GPT-6.1 Terra and Muse Spark 1.3 cost the same.*

* Using a 3:1 ratio of input to output tokens

Lowest available price from all providers
Thu Oct 29 2026 • llm-stats.com
OpenAI
GPT-6.1 Terra
Input tokens$1.00
Output tokens$5.00
Best providerOpenAI
Meta
Muse Spark 1.3
Input tokens$1.25
Output tokens$4.25
Best providerMeta
Notice missing or incorrect data?

Context Window

Maximum input and output token capacity

GPT-6.1 Terra accepts 1,050,000 input tokens compared to Muse Spark 1.3's 1,048,576 tokens. Muse Spark 1.3 can generate longer responses up to 943,718 tokens, while GPT-6.1 Terra is limited to 128,000 tokens.

OpenAI
GPT-6.1 Terra
Input1,050,000 tokens
Output128,000 tokens
Meta
Muse Spark 1.3
Input1,048,576 tokens
Output943,718 tokens
Thu Oct 29 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Both GPT-6.1 Terra and Muse Spark 1.3 support multimodal inputs.

They are both capable of processing various types of data, offering versatility in application.

GPT-6.1 Terra

Text
Images
Audio
Video

Muse Spark 1.3

Text
Images
Audio
Video

License

Usage and distribution terms

Both models are licensed under proprietary licenses.

Both models have usage restrictions defined by their respective organizations.

GPT-6.1 Terra

Proprietary

Closed source

Muse Spark 1.3

Proprietary

Closed source

Release Timeline

When each model was launched

GPT-6.1 Terra was released on 2026-10-26, while Muse Spark 1.3 was released on 2026-09-02.

GPT-6.1 Terra is 2 months newer than Muse Spark 1.3.

GPT-6.1 Terra

Oct 26, 2026

-1 days ago

1mo newer
Muse Spark 1.3

Sep 2, 2026

1 months ago

Knowledge Cutoff

When training data ends

GPT-6.1 Terra has a documented knowledge cutoff of 2026-06-01, while Muse Spark 1.3's cutoff date is not specified.

We can confirm GPT-6.1 Terra's training data extends to 2026-06-01, but cannot make a direct comparison without Muse Spark 1.3's cutoff date.

GPT-6.1 Terra

Jun 2026

Muse Spark 1.3

—

Provider Availability

GPT-6.1 Terra is available from OpenAI. Muse Spark 1.3 is available from Meta Model API.

GPT-6.1 Terra

openai logo
OpenAI
Input Price:Input: $1.00/1MOutput Price:Output: $5.00/1M

Muse Spark 1.3

meta logo
Meta
Input Price:Input: $1.25/1MOutput Price:Output: $4.25/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?

Judge for yourself.

Run your own prompts against GPT-6.1 Terra and Muse Spark 1.3 side-by-side, then vote on the output you prefer.

GPT-6.1 Terra
✓ Preferred
Muse Spark 1.3
Open in Playground

FAQ

Common questions about GPT-6.1 Terra vs Muse Spark 1.3.

Which is better, GPT-6.1 Terra or Muse Spark 1.3?

GPT-6.1 Terra and Muse Spark 1.3 are closely matched on the LLM Stats Score at 47.5 and 51.9. GPT-6.1 Terra is made by OpenAI and Muse Spark 1.3 is made by Meta. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does GPT-6.1 Terra compare to Muse Spark 1.3 in benchmarks?

GPT-6.1 Terra scores HealthBench Consensus: 95.1%, HealthBench Professional: 62.7%, Agents' Last Exam: 60.0%, Terminal-Bench-Science 0.1: 58.3%, MentalHealthBench: 55.5%. Muse Spark 1.3 scores MRCR v2 (8-needle): 98.5%, MRCR v2 (8-needle, 512K-1M): 98.1%, DeepSearchQA: 89.4%, Terminal-Bench 2.1: 88.8%, DeepSWE 1.1: 75.4%.

Is GPT-6.1 Terra cheaper than Muse Spark 1.3?

GPT-6.1 Terra is 1.3x cheaper for input tokens. GPT-6.1 Terra costs $1.00/M input and $5.00/M output via openai. Muse Spark 1.3 costs $1.25/M input and $4.25/M output via meta.

What are the context window sizes for GPT-6.1 Terra and Muse Spark 1.3?

GPT-6.1 Terra supports 1.1M tokens and Muse Spark 1.3 supports 1.0M tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between GPT-6.1 Terra and Muse Spark 1.3?

Key differences include LLM Stats Score (47.5 vs 51.9), context window (1.1M vs 1.0M), input pricing ($1.00 vs $1.25/M). See the full comparison above for benchmark-by-benchmark results.

Who makes GPT-6.1 Terra and Muse Spark 1.3?

GPT-6.1 Terra is developed by OpenAI and Muse Spark 1.3 is developed by Meta.

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