Model comparison
Gemini 4 Carbon vs GPT-5.5-Cyber
- Input
- $2.00
- Output
- $10.00
- Context
- not published
- Released
- 2026-10-28
- Input
- $5.00
- Output
- $30.00
- Context
- 1.05M
- Released
- 2026-05-07
Gemini 4 Carbon scores higher on 2 of the 2 benchmarks both models report; Gemini 4 Carbon is cheaper on input tokens ($2 vs $5 per 1M, 2.5×).
Specs and pricing side by side
| Spec | Gemini 4 Carbon | GPT-5.5-Cyber |
|---|---|---|
| Maker | OpenAI | |
| Released | 2026-10-28 | 2026-05-07 |
| Context window | not published | 1.05M |
| Max output | not published | 128K |
| Input price | $2.00 | $5.00 |
| Output price | $10.00 | $30.00 |
| Parameters | Undisclosed | Undisclosedsame |
| License | Proprietary | Proprietarysame |
| Weights | API only | API onlysame |
| Modalities | Text | Text, Vision |
| Knowledge cutoff | not published | Dec 2025 |
Benchmarks both models report
| Benchmark | Gemini 4 Carbon | GPT-5.5-Cyber |
|---|---|---|
| SEC-bench Pro | 88.2% | 69.8% |
| ExploitGym | 54.8% | 39.5% |
Scores are as published by each maker or its cited source; harness, reasoning effort and date can differ between rows, so treat small gaps as ties. Sources are listed on each model page.
Which one should you pick?
Pick Gemini 4 Carbon if…
- You care about SEC-bench Pro, ExploitGym (it scores higher on 2 shared benchmarks).
- Cost matters: input tokens cost 2.5× less ($2 vs $5 per 1M).
- Your use case is: reach for it for defensive security work, such as finding, triaging and patching vulnerabilities, if your organisation is admitted to Google's rollout.
Pick GPT-5.5-Cyber if…
- You need Vision input, which Gemini 4 Carbon lacks.
- Your use case is: reach for it when a vetted security team needs an authorized model that won't over-refuse on legitimate offensive testing (pentest, red teaming).
FAQ
Which is better, Gemini 4 Carbon or GPT-5.5-Cyber?
Gemini 4 Carbon scores higher on 2 of the 2 benchmarks both models report; Gemini 4 Carbon is cheaper on input tokens ($2 vs $5 per 1M, 2.5×). The better pick depends on whether you value benchmark scores, price per token, context length or openness for your workload.
How much cheaper is Gemini 4 Carbon?
Gemini 4 Carbon: $2.00 input, $10.00 output. GPT-5.5-Cyber: $5.00 input, $30.00 output (list API prices as published by each maker).
Is Gemini 4 Carbon newer than GPT-5.5-Cyber?
Gemini 4 Carbon was released 2026-10-28; GPT-5.5-Cyber was released 2026-05-07.