Lowest listed starting rate
OpenAI GPT-6 Luna$0.1 input / $0.5 output per 1M tokens
Standard rate. Batch is 50% off.
Pricing comparison
GPT-6 Luna vs Gemini 3.8 Flash Pricing Calculator
Compare estimated monthly cost, unit pricing, context windows, rate limits, and developer capabilities for GPT-6 Luna and Gemini 3.8 Flash.
Cheapest eligibleCalculating
Balanced optionCalculating
CoverageCalculating
| Provider / model | Estimated monthly cost | Unit price | Context | Rate limit | Signal |
|---|
Excluded or custom-priced models
| Provider / model | Status | Reason |
|---|
Side-by-Side Pricing
| Provider | Model | Category | Current pricing | Context | Capabilities |
|---|---|---|---|---|---|
| OpenAI | GPT-6 Luna Standard rate. Batch is 50% off. |
llm | $0.1 input / $0.5 output per 1M tokens | 272,000 | streaming json mode tool calling batch api |
| Google Gemini | Gemini 3.8 Flash Standard rates shown through Dec 31, 2026; they increase to $1.50 input / $7.50 output on Jan 1, 2027. |
llm | $0.75 input / $3.75 output per 1M tokens | 1,000,000 | streaming json mode tool calling batch api |
Recommended Starting Points
Balanced comparison pick
Google Gemini Gemini 3.8 Flash$0.75 input / $3.75 output per 1M tokens
Standard rates shown through Dec 31, 2026; they increase to $1.50 input / $7.50 output on Jan 1, 2027.
Pricing Details
| Provider | Model | Category | Current pricing | Context | Capabilities |
|---|---|---|---|---|---|
| OpenAI | GPT-6 Luna Standard rate. Batch is 50% off. |
llm | $0.1 input / $0.5 output per 1M tokens | 272,000 | streaming json mode tool calling batch api |
| Google Gemini | Gemini 3.8 Flash Standard rates shown through Dec 31, 2026; they increase to $1.50 input / $7.50 output on Jan 1, 2027. |
llm | $0.75 input / $3.75 output per 1M tokens | 1,000,000 | streaming json mode tool calling batch api |
Limits and Notes
Rates checked 2026-11-10. Tiered, batch, cached-input, peak/off-peak, and regional pricing can differ from the standard planning rate shown here. Confirm the official source before committing budget.
FAQ
How is monthly cost calculated?
Token APIs use input and output token prices. Per-request APIs use monthly requests. Character-priced TTS uses monthly characters, while token-priced speech models use text and audio token volumes. Vector database estimates use storage and read/write units when the provider publishes them.
Why are some models excluded?
The calculator excludes models that miss required context, rate-limit, streaming, JSON, or tool-calling requirements. Custom or purely resource-based pricing is also excluded from numeric ranking.
Are prices guaranteed?
No. This is a planning dataset with official source links. Model availability, promotions, and account-tier limits can change.
Data Sources and Last Checked
- OpenAI official pricing · checked 2026-11-10
- Google Gemini official pricing · checked 2026-11-10