Model comparison
Gemini 3.8 Flash vs gpt-oss-120b
GeminiCompare published specifications, vendor API list prices and measured Borg performance. Both models are included in Borg.
Gemini 3.8 Flash
gpt-oss-120b
Included in Borg
At a glance
| Specification | Gemini 3.8 Flash | gpt-oss-120b |
|---|---|---|
| Provider | OpenAI | |
| Release | 2026-09-02 Vendor source | 2025-08-05 Vendor source |
| Context | 1,048,576 tokens Vendor source | 131,072 tokens Vendor source |
| Modalities | Input: text, image, video, audio, pdf; output: text | Input: text; output: text |
| Reasoning / thinking modes | Yes / Not published | Yes / Not published |
| Open weights | No | Yes |
| Vendor API list price / 1M tokens | $0.75 input / $3.75 output Introductory rates through December 31, 2026. From January 1, 2027: $1.50 input / $7.50 output / $0.15 cached input per 1M tokens. | — |
| Borg | Included in Borg subscription | Included in Borg subscription |
Google
OpenAINot published by the vendor: vendor api list price / 1m tokens.
Measured 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)
Output tokens per second (whole turn)
| Metric | Gemini 3.8 Flash | gpt-oss-120b |
|---|---|---|
| Time to first token (gateway proxy) p50 | 2510 ms (1147 samples) | 6121 ms (15830 samples) |
| Tokens per second (end to end) p50 | 29.2 output tokens per second (85551 samples) | 46.8 output tokens per second (92214 samples) |
| Request success rate | Not published | 100% (21212 samples) |
| 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 3.8 Flash: Measured on Borg: SearchAtlas AI Gateway production request logs. 30-day window ending 2026-10-08; 92815 requests. Minimum 100 samples per published request metric.
gpt-oss-120b: Measured on Borg: SearchAtlas AI Gateway production request logs. 30-day window ending 2026-10-08; 93142 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 3.8 Flash is listed for long-horizon coding agents, whereas gpt-oss-120b is listed for private self-hosted reasoning. Choosing between Gemini 3.8 Flash and gpt-oss-120b requires checking published specifications against observed Borg traffic for your workflow.
Key differences
| Spec | Gemini 3.8 Flash | gpt-oss-120b |
|---|---|---|
| Context window | 1,048,576 tokens Vendor source Larger context | 131,072 tokens Vendor source |
| Reasoning modes | Yes / Not published | Yes / Not published |
| Release date | 2026-09-02 Vendor source | 2025-08-05 Vendor source |
| API price input / 1M | 0.75 Introductory rates through December 31, 2026. From January 1, 2027: $1.50 input / $7.50 output / $0.15 cached input per 1M tokens. | Not published |
| API price output / 1M | 3.75 Introductory rates through December 31, 2026. From January 1, 2027: $1.50 input / $7.50 output / $0.15 cached input per 1M tokens. | Not published |
| Time to first token (gateway proxy) | 2510 ms (1147 samples) Lower median | 6121 ms (15830 samples) |
| Output tokens per second (whole turn) | 29.2 output tokens/s (whole turn) (85551 samples) | 46.8 output tokens/s (whole turn) (92214 samples) Higher measured rate |
| Request success | Not published | 100% (21212 samples) |
| Coding bench | Not published | Not published |
FAQ
How do Gemini 3.8 Flash and gpt-oss-120b compare for coding?
Gemini 3.8 Flash has a Borg coding benchmark of not published; gpt-oss-120b has not published. The Gemini 3.8 Flash–gpt-oss-120b coding comparison cannot establish an overall winner from this small test alone.
How quickly do Gemini 3.8 Flash and gpt-oss-120b start responding on Borg?
Borg median first response for Gemini 3.8 Flash is 2,510 ms; for gpt-oss-120b it is 6,121 ms. The Gemini 3.8 Flash–gpt-oss-120b gateway medians are observations, not guaranteed latency for individual requests.
What are the API prices for Gemini 3.8 Flash and gpt-oss-120b?
The listed API rate for Gemini 3.8 Flash is $0.75 input / $3.75 output per 1M tokens; for gpt-oss-120b it is not published. Neither Gemini 3.8 Flash nor gpt-oss-120b has its Borg subscription charge represented by those provider API rates. Gemini 3.8 Flash vendor source
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