GPT-6.1 Sol API pricing
Official OpenAI list price, last checked Oct 29, 2026. Updated Oct 29, 2026.
GPT-6.1 Sol costs $2 per 1M input tokens and $10 per 1M output tokens, cached input at $0.10, and a 1M-token context window, per OpenAI's official pricing page (checked Oct 29, 2026). It's a premium-priced model: number 61 of 77 by blended price ($4 per 1M tokens at a 3 to 1 input to output mix). On LMArena's Code Arena it ranks #4 of 50 models we price (relative score 78 out of 100). Nothing cheaper scores close to it on that board; GPT-6.1 Terra is the nearest cheaper option.
GPT-6.1 Sol price per million tokens
| GPT-6.1 Sol price per million tokens | USD |
|---|---|
| Input | $2 |
| Cached input | $0.10 |
| Output | $10 |
| Blended, 3 parts input to 1 part output | $4 |
| Context window | 1M tokens |
| Prompts above 272K | $4 in, $15 out |
Official note from OpenAI: Prompts up to 272K. Longer prompts cost $4 in, $15 out.
What GPT-6.1 Sol costs for real work
List-price estimates for a month, no discounts. Our math, not a quote: change the token counts in the plan vs API calculator.
| Workload | Tokens a month | GPT-6.1 Sol | Claude Sonnet 5.5 | GPT-6.1 Terra |
|---|---|---|---|---|
| Light: a side project or personal assistant | 2M in, 0.5M out | $9.00 | $9.00 | $4.50 |
| Medium: a small team or one product feature | 20M in, 5M out | $90.00 | $90.00 | $45.00 |
| Heavy: a production app | 200M in, 50M out | $900 | $900 | $450 |
| Medium with 80% of input cached | 20M in (16M cached), 5M out | $59.60 | $59.60 | $29.80 |
| Medium, every prompt above the long-prompt threshold | 20M in, 5M out | $155 | $90.00 | $77.50 |
How GPT-6.1 Sol ranks on LMArena
Relative score: 100 is the top model we price on that board. Rank is among the models in our price table, not the full leaderboard.
| Board | Rank | Score /100 |
|---|---|---|
| Coding (Code Arena) | #4 of 50 | 78 |
| Chat (Text Arena) | #13 of 51 | 26 |
| Creative writing (Text Arena creative writing) | #14 of 51 | 11 |
| Roleplay and characters (Text Arena multi-turn) | #14 of 51 | 4 |
| Reasoning and math (Text Arena math) | #6 of 51 | 59 |
| Vision (Vision Arena) | #2 of 33 | 85 |
| Cheap bulk and agents (Agent Arena) | #5 of 34 | 78 |
Closest rivals to GPT-6.1 Sol
The models nearest in price, other makers first. Ranks are on Code Arena, where we have them.
| Model | In / out | Blended | Verdict |
|---|---|---|---|
| Claude Sonnet 5.5 | $2 / $10 | $4 | Claude Sonnet 5.5 wins: same price, higher score. Compare |
| Gemini 4 Argon | $2 / $10 | $4 | GPT-6.1 Sol wins: same price, higher score. Compare |
| Kimi K3.1 Pro | $2 / $10 | $4 | GPT-6.1 Sol wins: same price, higher score. Compare |
| Qwen3.7 Max | $2.50 / $7.50 | $3.75 | Qwen3.7 Max for price, GPT-6.1 Sol for quality. Compare |
Cheaper alternatives to GPT-6.1 Sol
At least 40% cheaper blended, best LMArena score first.
| Model | In / out | Blended | Verdict |
|---|---|---|---|
| GPT-6.1 Terra | $1 / $5 | $2 | GPT-6.1 Terra for price, GPT-6.1 Sol for quality. Compare |
| DeepSeek V4.1 Flash | $0.30 / $1.20 | $0.525 | DeepSeek V4.1 Flash for price, GPT-6.1 Sol for quality. Compare |
| Muse Spark 1.3 | $1.25 / $4.25 | $2 | Muse Spark 1.3 for price, GPT-6.1 Sol for quality. Compare |
More from OpenAI
- GPT-6 Sol$2 in, $10 out per 1M
- GPT-5.6 Terra$2 in, $12 out per 1M
- GPT-6.1 Terra$1 in, $5 out per 1M
- GPT-6 Luna$0.10 in, $0.50 out per 1M
- GPT-5.6 Sol$4 in, $20 out per 1M
FAQ
How much does the GPT-6.1 Sol API cost per million tokens?
$2 per 1M input tokens and $10 per 1M output tokens, plus $0.10 per 1M for cached input, as of Oct 29, 2026. A typical 3 to 1 input to output mix works out to $4 per 1M tokens.
Does GPT-6.1 Sol charge more for long prompts?
Yes. Prompts above 272K: $4 in, $15 out.
Is GPT-6.1 Sol cheaper than Claude Sonnet 5.5?
About the same. A medium month (20M input and 5M output tokens) costs $90.00 on GPT-6.1 Sol and $90.00 on Claude Sonnet 5.5 at list price. On Code Arena, GPT-6.1 Sol ranks #4 and Claude Sonnet 5.5 #3.
How does GPT-6.1 Sol rank on LMArena?
On Code Arena it is #4 of 50 models we price, with a relative score of 78 out of 100. It ranks on 7 of 8 boards we track.
What is a cheaper alternative to GPT-6.1 Sol?
GPT-6.1 Terra costs $1 in and $5 out per 1M tokens, about 2.0x less blended, and scores 49 on Code Arena against 78 for GPT-6.1 Sol.
Where does this GPT-6.1 Sol price come from?
From OpenAI's official pricing page, which we check every day. This page was last checked Oct 29, 2026.