High-volume, cost-sensitive work
Either one
Both cost $4.00 per million tokens on a typical mix of three input tokens for every output token.
Gemini 4 Argon vs GPT-6.1 Sol: price, context and capabilities
Choose Gemini 4 Argon for the latest release. Choose GPT-6.1 Sol for reasoning over long documents.
In short
- Both cost the same at the headline price ($4.00 / 1M tokens).
- GPT-6.1 Sol reads more per request: 1.05M tokens against 1.05M.
- Gemini 4 Argon is the newer model (October 2026, against Sep 29, 2026).
Which should you choose?
Each answer below comes straight from the published prices, specifications and independent benchmark results.
Hardest reasoning tasks
Either one
They are practically level on the Artificial Analysis Intelligence Index (52.6 and 51.8).
Reasoning over long documents
Choose GPT-6.1 Sol
GPT-6.1 Sol scores 83% on Long-context reasoning (AA-LCR), against 79.7% for Gemini 4 Argon.
Latest release
Choose Gemini 4 Argon
Gemini 4 Argon is the newer release (October 2026, against Sep 29, 2026 for GPT-6.1 Sol).
Monthly cost at three volumes
| Volume | Gemini 4 Argon | GPT-6.1 Sol | Difference |
|---|---|---|---|
| Prototype: 1M input, 250K output tokens | $4.50 | $4.50 | = |
| Production: 20M input, 5M output tokens | $90.00 | $90.00 | = |
| Scale: 500M input, 100M output tokens | $2,000 | $2,000 | = |
Standard rates, without caching or batch discounts. Volumes are per month.
Specifications side by side
| Gemini 4 Argon | GPT-6.1 Sol | |
|---|---|---|
| Provider | OpenAI | |
| Category | Language models | Language models |
| Status | Generally available | Generally available |
| Headline price | $4.00 / 1M tokens | $4.00 / 1M tokens |
| Input | $2.00 / 1M tokens | $2.00 / 1M tokens |
| Output | $10.00 / 1M tokens | $10.00 / 1M tokens |
| Cached input | $0.10 / 1M tokens | $0.10 / 1M tokens |
| Context window | 1.05M | 1.05M |
| Max output | 66k | 128k |
| Released | October 2026 | Sep 29, 2026 |
| Knowledge cutoff | No data | April 2026 |
| Licence | Proprietary | Proprietary |
| Capabilities | Vision, Reasoning, Tool calling, Structured output, Prompt caching, Batch API | Vision, Reasoning, Tool calling, Structured output, Prompt caching, Batch API |
| API model id | gemini-4-argon | gpt-6.1-sol |
Benchmarks side by side
Leader in bold.
| Benchmark | Gemini 4 Argon | GPT-6.1 Sol |
|---|---|---|
| Intelligence Index | 52.6 | 51.8 |
| SciCode | 61.8% | 54.2% |
| Humanity's Last Exam | 57.1% | 52.9% |
| Long-context reasoning (AA-LCR) | 79.7% | 83% |
| MMMU-Pro (visual reasoning) | No data | 86% |
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 4 Argon or GPT-6.1 Sol?
Choose Gemini 4 Argon for the latest release. Choose GPT-6.1 Sol for reasoning over long documents.
Which is cheaper, Gemini 4 Argon or GPT-6.1 Sol?
Both cost the same at the headline price ($4.00 / 1M tokens).
Which has the larger context window, Gemini 4 Argon or GPT-6.1 Sol?
GPT-6.1 Sol reads more per request: 1.05M tokens against 1.05M.
What is the difference between Gemini 4 Argon and GPT-6.1 Sol?
Gemini 4 Argon is made by Google and GPT-6.1 Sol by OpenAI. Both cost the same at the headline price ($4.00 / 1M tokens). GPT-6.1 Sol reads more per request: 1.05M tokens against 1.05M. Gemini 4 Argon is the newer model (October 2026, against Sep 29, 2026).
How much do Gemini 4 Argon and GPT-6.1 Sol cost per month?
At 20 million input and 5 million output tokens a month, Gemini 4 Argon costs $90.00 and GPT-6.1 Sol costs $90.00, at standard rates.
Which is newer, Gemini 4 Argon or GPT-6.1 Sol?
Gemini 4 Argon was released on October 2026 and GPT-6.1 Sol on Sep 29, 2026.