GPT-5.6 Luna vs Gemini 3.8 Flash
Rank, tier, score and price side by side, from our weekly rankings. Scores are editorial opinion based on public sources.
A
GPT-5.6 Luna
B
Gemini 3.8 Flash
- ProviderOpenAIGoogle
- Rank#39#29Higher rank
- TierAA
- Score81.483.2Higher score
- Price$0.20 per 1M input tokens, $1.20 per 1M output tokensAPI $0.75 input / $3.75 output per 1M tokens through Dec 31, 2026 ($1.50 / $7.50 from Jan 1, 2027)
- TaglineOpenAI's cost-optimized GPT-5.6 tier, repriced 80% lower in July 2026 for high-volume production workloads.Google's fast Flash model tuned for complex agentic tasks at scale.
| Attribute | GPT-5.6 Luna | Gemini 3.8 Flash |
|---|---|---|
| Provider | OpenAI | |
| Rank | #39 | #29Higher rank |
| Tier | A | A |
| Score | 81.4 | 83.2Higher score |
| Price | $0.20 per 1M input tokens, $1.20 per 1M output tokens | API $0.75 input / $3.75 output per 1M tokens through Dec 31, 2026 ($1.50 / $7.50 from Jan 1, 2027) |
| Tagline | OpenAI's cost-optimized GPT-5.6 tier, repriced 80% lower in July 2026 for high-volume production workloads. | Google's fast Flash model tuned for complex agentic tasks at scale. |