Model comparison
Gemini 3.1 Pro vs Muse Spark 1.3
GeminiCompare published specifications, vendor API list prices and measured Borg performance. Both models are included in Borg.
Gemini 3.1 Pro
Muse Spark 1.3
Included in Borg
At a glance
| Specification | Gemini 3.1 Pro | Muse Spark 1.3 |
|---|---|---|
| Provider | Meta | |
| Release | 2026-02-19 Vendor source | 2026-09-02 Vendor source |
| Context | 1,048,576 tokens Vendor source | 1,048,576 tokens Vendor source |
| Modalities | Input: text, image, video, audio, pdf; output: text | Input: text, image, video, audio, PDF; output: text |
| Reasoning / thinking modes | Yes / Not published | Yes / Not published |
| Open weights | No | No |
| Vendor API list price / 1M tokens | $2 input / $12 output Rates for prompts of at most 200,000 tokens; longer prompts cost more. | $1.25 input / $4.25 output |
| Borg | Included in Borg subscription | Included in Borg subscription |
Google
MetaMeasured on Borg
Metrics are not directly comparable to vendor benchmark claims. Models served different requests; this is observed gateway traffic, not a controlled head-to-head test.
Time to first token (gateway proxy)
No published measurement for this model.
Output tokens per second (whole turn)
No published measurement for this model.
| Metric | Gemini 3.1 Pro | Muse Spark 1.3 |
|---|---|---|
| Time to first token (gateway proxy) p50 | Not published | 5938 ms (1912 samples) |
| Tokens per second (end to end) p50 | Not published | 26.2 output tokens per second (1928 samples) |
| Request success rate | Not published | Not published |
| Coding bench pass rate | Not published | Not published |
Measurement window, samples and methodology
The fleet reference is the median of published model medians, not a request-weighted result. Prompt lengths, reasoning settings and traffic differ between models.
Gemini 3.1 Pro: Measured on Borg: SearchAtlas AI Gateway production request logs. 30-day window ending 2026-10-08; 278 requests. Minimum 100 samples per published request metric.
Muse Spark 1.3: Measured on Borg: SearchAtlas AI Gateway production request logs. 30-day window ending 2026-10-08; 2340 requests. Minimum 100 samples per published request metric.
Completion speed covers the whole turn including queueing and reasoning time; it is not a streaming tokens-per-second figure.
- Time to first token (gateway proxy): time until the first streamed response event reaches the gateway; our closest available measure of time to first token
- Tokens per second (end to end): tokens per second, end to end: provider-reported output tokens divided by the whole turn's elapsed time, including queueing and reasoning; not a streaming per-token rate
How to choose
Gemini 3.1 Pro is listed for complex software engineering, whereas Muse Spark 1.3 is listed for long-horizon coding with changing requirements. Choosing between Gemini 3.1 Pro and Muse Spark 1.3 requires checking published specifications against observed Borg traffic for your workflow.
Key differences
| Spec | Gemini 3.1 Pro | Muse Spark 1.3 |
|---|---|---|
| Context window | 1,048,576 tokens Vendor source | 1,048,576 tokens Vendor source |
| Reasoning modes | Yes / Not published | Yes / Not published |
| Release date | 2026-02-19 Vendor source | 2026-09-02 Vendor source |
| API price input / 1M | 2 Rates for prompts of at most 200,000 tokens; longer prompts cost more. | 1.25 Lower listed rate |
| API price output / 1M | 12 Rates for prompts of at most 200,000 tokens; longer prompts cost more. | 4.25 Lower listed rate |
| Time to first token (gateway proxy) | Not published | 5938 ms (1912 samples) |
| Output tokens per second (whole turn) | Not published | 26.2 output tokens/s (whole turn) (1928 samples) |
| Request success | Not published | Not published |
| Coding bench | Not published | Not published |
FAQ
How do Gemini 3.1 Pro and Muse Spark 1.3 compare for coding?
Gemini 3.1 Pro has a Borg coding benchmark of not published; Muse Spark 1.3 has not published. The Gemini 3.1 Pro–Muse Spark 1.3 coding comparison cannot establish an overall winner from this small test alone.
How quickly do Gemini 3.1 Pro and Muse Spark 1.3 start responding on Borg?
Borg median first response for Gemini 3.1 Pro is not published; for Muse Spark 1.3 it is 5,938 ms. The Gemini 3.1 Pro–Muse Spark 1.3 gateway medians are observations, not guaranteed latency for individual requests.
What are the API prices for Gemini 3.1 Pro and Muse Spark 1.3?
The listed API rate for Gemini 3.1 Pro is $2 input / $12 output per 1M tokens; for Muse Spark 1.3 it is $1.25 input / $4.25 output per 1M tokens. Neither Gemini 3.1 Pro nor Muse Spark 1.3 has its Borg subscription charge represented by those provider API rates. Gemini 3.1 Pro vendor source · Muse Spark 1.3 vendor source
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