GPT-6.1 Sol vs Gemini 4 Argon
Official OpenAI and Google API prices and LMArena scores, checked 2026-10-18. Add up to 2 more models to compare 4.
Same bill; Gemini 4 Argon wins more LMArena tasks.
GPT-6.1 Sol and Gemini 4 Argon have the same list price per token ($2 in, $10 out per 1M). Gemini 4 Argon scores 85 points higher for roleplay; GPT-6.1 Sol scores 27 points higher for coding. Across 6 shared LMArena tasks, Gemini 4 Argon leads 4 to 2. A medium month (20M input + 5M output tokens) costs $90 on GPT-6.1 Sol and $90 on Gemini 4 Argon.
- Pick GPT-6.1 Sol if you care most about coding (+27).
- Pick Gemini 4 Argon if you care most about roleplay (+85), creative writing (+77) and chat (+70).
Medium: 20M input + 5M output tokens a month at list price (short-context rate, no caching or batch discounts).
Marked side is better: lower for prices, higher for context and scores. Bars are scaled to the larger of the two.
| Spec | GPT-6.1 Sol | Gemini 4 Argon |
|---|---|---|
| Price per 1M tokens | ||
| Input | $2 | $2 |
| Cached input | $0.10 | $0.10 |
| Output | $10 | $10 |
| Blend 3:1 | $4 | $4 |
| Sample month, medium | $90 | $90 |
| Context | ||
| Context window | 1.05M tokens | 1M tokens |
| Quality (LMArena, out of 100) | ||
| Coding | 82/100 #4 of 23 | 55/100 #8 of 23 |
| Chat | 30/100 #10 of 25 | 100/100 #1 of 25 |
| Creative writing | 18/100 #12 of 25 | 95/100 #2 of 25 |
| Roleplay and characters | 15/100 #11 of 25 | 100/100 #1 of 25 |
| Reasoning and math | 39/100 #12 of 24 | 100/100 #1 of 24 |
| Vision | 85/100 #2 of 21 | Not ranked |
| Long documents | Not ranked | Not ranked |
| Cheap bulk and agents | 84/100 #4 of 23 | 83/100 #5 of 23 |
| Details | ||
| Provider | OpenAI | |
| API model id | gpt-6.1-sol | gemini-4-argon |
| Notes | Prompts up to 272K. Longer prompts cost $4 in, $15 out. | Launch price through Nov 30, 2026. From Dec 1: $4 in, $20 out. |
| Sources | ||
| Last checked | 2026-10-18 | 2026-10-18 |
| Official pricing | OpenAI pricing | Google pricing |
Plans from data checked hourly against each vendor's official pricing page. Vendors state limits in different units, so we quote them as published. Team and enterprise plans are per seat.
API prices in USD per 1M tokens from each provider's official pricing page. Blend 3:1 = (3 x input + output) / 4. Sample month = stated input and output tokens at the list price, no caching. Quality: relative score out of 100 on each LMArena leaderboard (100 = top model we price on that board, n/a = not ranked there), data licensed CC BY 4.0. See how we pick.
Where each one ranks on LMArena
Relative score out of 100 on each leaderboard (100 = the top model we price there), with the rank among the models from our API price table that appear on that board.
- Coding (Code Arena): GPT-6.1 Sol #4 of 23 (82/100), Gemini 4 Argon #8 of 23 (55/100)
- Chat (Text Arena): GPT-6.1 Sol #10 of 25 (30/100), Gemini 4 Argon #1 of 25 (100/100)
- Creative writing (Text Arena creative writing): GPT-6.1 Sol #12 of 25 (18/100), Gemini 4 Argon #2 of 25 (95/100)
- Roleplay and characters (Text Arena multi-turn): GPT-6.1 Sol #11 of 25 (15/100), Gemini 4 Argon #1 of 25 (100/100)
- Reasoning and math (Text Arena math): GPT-6.1 Sol #12 of 24 (39/100), Gemini 4 Argon #1 of 24 (100/100)
- Vision (Vision Arena): GPT-6.1 Sol #2 of 21 (85/100), Gemini 4 Argon not ranked
- Long documents (Document Arena): GPT-6.1 Sol not ranked, Gemini 4 Argon not ranked
- Cheap bulk and agents (Agent Arena): GPT-6.1 Sol #4 of 23 (84/100), Gemini 4 Argon #5 of 23 (83/100)
Pricing details from the official pages
GPT-6.1 Sol lists $2 input, $10 output, $0.10 cached input per 1M tokens on OpenAI pricing. Gemini 4 Argon lists $2 input, $10 output, $0.10 cached input per 1M tokens on Google pricing. Prices checked 2026-10-18.
- GPT-6.1 Sol: Prompts up to 272K. Longer prompts cost $4 in, $15 out.
- Gemini 4 Argon: Launch price through Nov 30, 2026. From Dec 1: $4 in, $20 out.
Sample monthly bill at list price, no caching: Light (2M input + 0.5M output tokens): $9 vs $9. Medium (20M input + 5M output tokens): $90 vs $90. Heavy (200M input + 50M output tokens): $900 vs $900.
FAQ
Is GPT-6.1 Sol cheaper than Gemini 4 Argon?
They have the same list price: $2 input and $10 output per 1M tokens.
Which is better for coding, GPT-6.1 Sol or Gemini 4 Argon?
On LMArena's Code Arena GPT-6.1 Sol scores 82/100 (#4 of 23) and Gemini 4 Argon 55/100 (#8 of 23), so GPT-6.1 Sol is ahead by 27 points.
Which has the bigger context window?
GPT-6.1 Sol: 1.05M tokens. Gemini 4 Argon: 1M tokens. Long prompts can cost more; see the pricing notes above.
How much do GPT-6.1 Sol and Gemini 4 Argon cost per month?
Light (2M input + 0.5M output tokens): $9 vs $9. Medium (20M input + 5M output tokens): $90 vs $90. Heavy (200M input + 50M output tokens): $900 vs $900. Pick your own token counts in the plan vs API calculator.
Where do these numbers come from?
Prices come from each provider's official pricing page, checked daily. Quality is the relative score on the LMArena leaderboard dataset, licensed CC BY 4.0. Where a model is not ranked we show n/a.