Gemini 3.8 Flash vs GPT-6 Astra: Specs & Benchmark Comparison
| Characteristic | Gemini 3.8 Flash | GPT-6 Astra |
|---|---|---|
| Company | OpenAI | |
| Release Date | September 2, 2026 | September 3, 2026 |
| Parameters | — | — |
| Multimodal | Yes | Yes |
| Context (input) | 1.0M | 1.1M |
| Context (output) | 66K | 128K |
| Input Price / 1M | $0.75 | $10.00 |
| Output Price / 1M | $3.75 | $50.00 |
| Average Score | 0.6 | 0.7 |
| Benchmarks | ||
| Terminal-Bench 4.0 | 0.2 | 0.6 |
| OSWorld 2.0 | 0.6 | 0.7 |
| DeepSWE 1.1 | 0.7 | 0.7 |
Visual Benchmark Comparison
Gemini 3.8 Flash
GPT-6 Astra
Terminal-Bench 4.00.2 vs 0.6
0.2
0.6
OSWorld 2.00.6 vs 0.7
0.6
0.7
DeepSWE 1.10.7 vs 0.7
0.7
0.7
Verdict
Both models show equal results — the choice depends on your specific use case.
Overall Performance
Both models show comparable average scores: Gemini 3.8 Flash — 0.6, GPT-6 Astra — 0.7.
API Cost
Gemini 3.8 Flash is 13.3x cheaper: input $0.75/1M vs $10.00/1M tokens.
Context Window
GPT-6 Astra supports a larger context: 1M vs 1M tokens.
Recency
Both models were released around the same time: 9/2/2026 and 9/3/2026.
More About These Models
Related Comparisons
Frequently Asked Questions
Which is better for coding — Gemini 3.8 Flash or GPT-6 Astra?
Direct comparison on the SWE-Bench benchmark is not available. We recommend reviewing other metrics on the comparison page.
Which model is cheaper — Gemini 3.8 Flash or GPT-6 Astra?
Gemini 3.8 Flash is cheaper for input: $0.75 per 1M tokens vs $10.00.
Which has a larger context window — Gemini 3.8 Flash or GPT-6 Astra?
GPT-6 Astra supports a larger context: 1,050,000 tokens vs 1,048,576.
The Gemini 3.8 Flash and GPT-6 Astra comparison is updated for 2026. Data includes benchmark results, API pricing, context window size and other specifications. For more detailed information, visit the Gemini 3.8 Flash or GPT-6 Astra page. See also the complete list of AI model comparisons.