High-volume, cost-sensitive work
Choose Gemini Omni Flash
Gemini Omni Flash costs 4% less on a typical mix of three input tokens for every output token ($3.38 against $3.50 per million tokens).
Gemini Omni Flash vs o3: price, context and capabilities
Choose Gemini Omni Flash for high-volume, cost-sensitive work, very long inputs and the latest release. Choose o3 for writing and code generation.
In short
- Gemini Omni Flash is 4% cheaper than o3 at the headline price ($3.38 / 1M tokens vs $3.50 / 1M tokens).
- Gemini Omni Flash reads more per request: 1.05M tokens against 200k.
- Gemini Omni Flash is the newer model (August 2026, against Apr 16, 2025).
- Only Gemini Omni Flash offers audio input, video input.
- Only o3 offers prompt caching.
Which should you choose?
Each answer below comes straight from the published prices, specifications and independent benchmark results.
Writing and code generation
Choose o3
o3 charges $8.00 per million output tokens, against $9.00 for Gemini Omni Flash. Output dominates the bill when answers are long.
Very long inputs
Choose Gemini Omni Flash
Gemini Omni Flash reads up to 1.05M tokens per request, against 200k for o3.
Latest release
Choose Gemini Omni Flash
Gemini Omni Flash is the newer release (August 2026, against Apr 16, 2025 for o3).
Monthly cost at three volumes
| Volume | Gemini Omni Flash | o3 | Difference |
|---|---|---|---|
| Prototype: 1M input, 250K output tokens | $3.75 | $4.00 | Gemini Omni Flash, $0.25 less |
| Production: 20M input, 5M output tokens | $75.00 | $80.00 | Gemini Omni Flash, $5.00 less |
| Scale: 500M input, 100M output tokens | $1,650 | $1,800 | Gemini Omni Flash, $150.00 less |
Standard rates, without caching or batch discounts. Volumes are per month.
Specifications side by side
| Gemini Omni Flash | o3 | |
|---|---|---|
| Provider | OpenAI | |
| Category | Language models | Language models |
| Status | Generally available | Legacy |
| Headline price | $3.38 / 1M tokens | $3.50 / 1M tokens |
| Input | $1.50 / 1M tokens | $2.00 / 1M tokens |
| Output | $9.00 / 1M tokens | $8.00 / 1M tokens |
| Cached input | No data | $0.50 / 1M tokens |
| Context window | 1.05M | 200k |
| Max output | No data | 100k |
| Released | August 2026 | Apr 16, 2025 |
| Knowledge cutoff | No data | June 2024 |
| Licence | Proprietary | Proprietary |
| Capabilities | Vision, Audio input, Video input, Reasoning, Tool calling, Structured output, Batch API | Vision, Reasoning, Tool calling, Structured output, Prompt caching, Batch API |
| API model id | gemini-omni-1.1-flash | o3 |
Benchmarks side by side
Leader in bold.
| Benchmark | Gemini Omni Flash | o3 |
|---|---|---|
| Terminal-Bench Hard | No data | 37.1% |
| GPQA Diamond | No data | 82.7% |
| Humanity's Last Exam | No data | 20.1% |
| IFBench (instruction following) | No data | 71.4% |
| τ²-Bench (agentic tool use) | No data | 80.7% |
| MMMU-Pro (visual reasoning) | No data | 70.1% |
| Long-context reasoning (AA-LCR) | No data | 74.7% |
Independent evaluations by Artificial Analysis, run the same way for every model, at the reasoning setting shown. Percentages unless marked as an index.
Frequently asked questions
Should I choose Gemini Omni Flash or o3?
Choose Gemini Omni Flash for high-volume, cost-sensitive work, very long inputs and the latest release. Choose o3 for writing and code generation.
Which is cheaper, Gemini Omni Flash or o3?
Gemini Omni Flash is 4% cheaper than o3 at the headline price ($3.38 / 1M tokens vs $3.50 / 1M tokens).
Which has the larger context window, Gemini Omni Flash or o3?
Gemini Omni Flash reads more per request: 1.05M tokens against 200k.
What is the difference between Gemini Omni Flash and o3?
Gemini Omni Flash is made by Google and o3 by OpenAI. Gemini Omni Flash is 4% cheaper than o3 at the headline price ($3.38 / 1M tokens vs $3.50 / 1M tokens). Gemini Omni Flash reads more per request: 1.05M tokens against 200k. Gemini Omni Flash is the newer model (August 2026, against Apr 16, 2025). Only Gemini Omni Flash offers audio input, video input. Only o3 offers prompt caching.
How much do Gemini Omni Flash and o3 cost per month?
At 20 million input and 5 million output tokens a month, Gemini Omni Flash costs $75.00 and o3 costs $80.00, at standard rates.
Which is newer, Gemini Omni Flash or o3?
Gemini Omni Flash was released on August 2026 and o3 on Apr 16, 2025.