GPT-5.6 Terra Max vs Muse Spark 1.3 Max compared

Muse Spark 1.3 Max leads the intelligence index 36.6 to 32.3. Muse Spark 1.3 Max costs 56% less on blended price. See token costs, speed and which to pick.

Metric	GPT-5.6 Terra (Max)	Muse Spark 1.3 (Max)
Intelligence Index	32.3	36.6
Input price (per 1M tokens)	$2.00	$1.25
Output price (per 1M tokens)	$12.00	$4.25
Output speed (tokens/s)	116	140
Time to first token	3.4 min	36s
Release date	2026-07-09	2026-09-02

Metric

GPT-5.6 Terra (Max)

Muse Spark 1.3 (Max)

Intelligence Index

32.3

36.6

Input price (per 1M tokens)

$2.00

$1.25

Output price (per 1M tokens)

$12.00

$4.25

Output speed (tokens/s)

116

140

Time to first token

3.4 min

36s

Release date

2026-07-09

2026-09-02

GPT-5.6 Terra (Max) from OpenAI and Muse Spark 1.3 (Max) from Meta are both tracked in Franklin AI's benchmark catalogue. Cost is where they split the most, with Muse Spark 1.3 Max working out at about 44% of GPT-5.6 Terra Max's blended rate. All numbers are the catalogue's recorded values; nobody ran either model by hand for this page.

What they cost

Per million tokens, GPT-5.6 Terra Max charges $2.00 for input and $12.00 for output, while Muse Spark 1.3 Max charges $1.25 and $4.25. That makes Muse Spark 1.3 Max's output 65% cheaper.

A reference job of 1 million input tokens and 200,000 output tokens costs $4.40 with GPT-5.6 Terra Max and $2.10 with Muse Spark 1.3 Max, so Muse Spark 1.3 Max saves $2.30. A bigger example, summarising 1,000 documents of 8,000 tokens into 400-token summaries, costs $20.80 on GPT-5.6 Terra Max and $11.70 on Muse Spark 1.3 Max: a gap of $9.10.

Overall capability: 4.3 points apart

Muse Spark 1.3 Max comes out ahead on the intelligence index, 36.6 to 32.3. It is a meaningful gap rather than a rounding difference. Put another way, GPT-5.6 Terra Max would need 13% more on this index to draw level.

Across the 109 active models with an intelligence score in the catalogue, GPT-5.6 Terra Max ranks 46th and Muse Spark 1.3 Max ranks 36th.

Neither model has a separate coding or math index recorded yet, so those narrower comparisons will have to wait for more data.

Release timing

Muse Spark 1.3 Max arrived on September 2, 2026, about 2 months after GPT-5.6 Terra Max (July 9, 2026).

Value for money

Per point of intelligence index, GPT-5.6 Terra Max costs $0.14 of blended price per million tokens and Muse Spark 1.3 Max $0.055. With the higher score and the lower cost per point, Muse Spark 1.3 Max is the better value per point on these numbers.

Muse Spark 1.3 Max is the faster writer

GPT-5.6 Terra Max generates about 116 tokens per second and Muse Spark 1.3 Max about 140 tokens per second. That makes Muse Spark 1.3 Max roughly 1.2 times as fast at writing. Time to first token is 3.4 minutes for GPT-5.6 Terra Max and 36 seconds for Muse Spark 1.3 Max. GPT-5.6 Terra Max waits 5.7 times as long before its first token. A first-token wait of that length suits background work better than live conversation.

Put together, an 800-token answer would take about 3.5 minutes from GPT-5.6 Terra Max and 42 seconds from Muse Spark 1.3 Max, counting the first-token wait.

Frequently asked questions

Is GPT-5.6 Terra Max better than Muse Spark 1.3 Max?

Muse Spark 1.3 Max leads on every measure the catalogue separates: Muse Spark 1.3 Max scores higher on the intelligence index, 36.6 to 32.3; Muse Spark 1.3 Max is 56% cheaper on blended price; and Muse Spark 1.3 Max streams output 1.2 times as fast.

Are GPT-5.6 Terra Max and Muse Spark 1.3 Max from the same company?

GPT-5.6 Terra Max is made by OpenAI and Muse Spark 1.3 Max by Meta. GPT-5.6 Terra Max was released on July 9, 2026 and Muse Spark 1.3 Max on September 2, 2026.

How much do GPT-5.6 Terra Max and Muse Spark 1.3 Max cost?

Muse Spark 1.3 Max is cheaper on a blended basis. GPT-5.6 Terra Max lists $2.00 per million input tokens and $12.00 per million output tokens; Muse Spark 1.3 Max lists $1.25 and $4.25. For 1 million input and 200,000 output tokens that is $4.40 against $2.10.

Which is faster, GPT-5.6 Terra Max or Muse Spark 1.3 Max?

Muse Spark 1.3 Max generates output faster, at 140 tokens per second against 116 tokens per second. Muse Spark 1.3 Max reaches its first token sooner (36 seconds against 3.4 minutes).

Was this comparison tested by hand?

The figures are the recorded benchmark, price and speed data in Franklin AI's model catalogue. This page is written from that data automatically; neither model was tested by hand for it.

Final whistle

The verdict: on these numbers Muse Spark 1.3 Max is the clear pick over GPT-5.6 Terra Max. Pick GPT-5.6 Terra Max only if your own tests show an advantage the recorded data does not. Pick Muse Spark 1.3 Max if you need the higher overall score (36.6 against 32.3) and cost matters ($4.25 against $12.00 per million output tokens).

Where the numbers come from

The scores, speed and prices in this comparison come from independent third-party model evaluations that Franklin AI syncs each day, and the article was written from a snapshot of them. For the latest results, open the GPT-5.6 Terra (Max) and Muse Spark 1.3 (Max) pages. The AI Benchmark methodology explains how that data is collected and shown.