Gemini 3.8 Flash High vs Muse Spark Open compared

Here is how Gemini 3.8 Flash (High), built by Google, lines up against Muse Spark Open (Xhigh) from Meta. This page is written automatically from catalogue numbers only: benchmark scores, list prices and measured speed. The widest gap is the wait for the first token: 0.94 seconds for Muse Spark Open against 27 seconds for Gemini 3.8 Flash High.

Muse Spark Open is the faster writer

Gemini 3.8 Flash High generates about 121 tokens per second and Muse Spark Open about 207 tokens per second. On long outputs, that is a real advantage for Muse Spark Open. Time to first token is 27 seconds for Gemini 3.8 Flash High and 0.94 seconds for Muse Spark Open. Gemini 3.8 Flash High waits 29 times as long before its first token.

Put together, a 2,000-token answer would take about 44 seconds from Gemini 3.8 Flash High and 11 seconds from Muse Spark Open, counting the first-token wait.

Running costs

The list prices are $0.75 in and $3.75 out for Gemini 3.8 Flash High, and $1.25 in and $4.25 out for Muse Spark Open, per million tokens. That makes Gemini 3.8 Flash High's output 12% cheaper.

A reference job of 1 million input tokens and 200,000 output tokens costs $1.50 with Gemini 3.8 Flash High and $2.10 with Muse Spark Open, so Gemini 3.8 Flash High saves $0.60. A bigger example, a support assistant answering 10,000 conversations of 2,000 input and 500 output tokens each, costs $33.75 on Gemini 3.8 Flash High and $46.25 on Muse Spark Open: a gap of $12.50.

Release timing

Muse Spark Open arrived on October 15, 2026, 43 days after Gemini 3.8 Flash High (September 2, 2026). That is close enough to count them as the same generation.

Reasoning and overall scores

The catalogue puts Gemini 3.8 Flash High at 30.8 and Muse Spark Open at 24.9 on its intelligence index. It is a meaningful gap rather than a rounding difference. Put another way, Muse Spark Open would need 24% more on this index to draw level.

For context, that places Gemini 3.8 Flash High 50th and Muse Spark Open 68th out of 109 scored models still on offer.

For coding or maths work specifically, the catalogue has no dedicated index on either side yet.

Is the price in proportion?

Per point of intelligence index, Gemini 3.8 Flash High costs $0.049 of blended price per million tokens and Muse Spark Open $0.080. Gemini 3.8 Flash High scores higher and costs less per point, so on price per point there is nothing to trade off.