Compare / GPT-6.1 Sol vs Inkling Small
GPT-6.1 Sol vs Inkling Small
Which is cheaper, which is more capable, and which does better at each kind of work, from 29 results on 4 sources that measured both models.
Of the 29 results both models have, the better value on each. Results whose reported ranges overlap are too close to call.
Results as of 9 October 2026 (catalogue release 2026-10-09-dd620e778ac5).
GPT-6.1 Sol or Inkling Small? The short answer
Pick GPT-6.1 Sol if quality matters most: it scores higher (Intelligence Index 51.8 against 25.7). Pick Inkling Small if cost matters more: it costs 2.8 times less per game of bullet chess on BulletBench. Inkling Small is also faster.
- Inkling Small is cheaper to run: $0.007 against $0.021 per game of bullet chess on BulletBench (2.8 times less).
- GPT-6.1 Sol scores higher on the Artificial Analysis Intelligence Index: 51.8 against 25.7.
- Inkling Small writes faster: 173 tokens a second against 55.
- GPT-6.1 Sol is newer: released 29 Sep 2026, against 15 Jul 2026 for Inkling Small.
- On our own benchmarks, on the results both models have: GPT-6.1 Sol does better for speed under pressure.
- On third-party benchmarks, on the results both models have: GPT-6.1 Sol does better for agents and tool use, reasoning and knowledge, writing and sticking to the facts.
Head to head
Every fact side by side
| GPT-6.1 Sol | Inkling Small | |
|---|---|---|
| Price per million tokens | $2.00 in · $10.00 out | $0.45 in · $1.20 out |
| Blended (3 in : 1 out) | $4.00 | $0.64 |
| Cheapest host, blended | $4.00 (Azure) | – |
| Cost per game of bullet chess (BulletBench) | $0.021 | $0.007 |
| Cached input, per million | $0.10 cached input | – |
| Intelligence Index | 51.8 | 25.7 |
| Spring Prompt overall | 81 | – |
| Output speed, tokens a second | 55 | 173 |
| Context window | 1,050,000 tokens | 524,288 tokens |
| Released | 29 Sep 2026 (newer) | 15 Jul 2026 |
| Weights | Closed | Open |
| Developer based in | the US | the US |
Prices are the developer's list price where we have read it, otherwise the typical host on OpenRouter; see every model's price. Intelligence and speed from Artificial Analysis.
Which is better for what
Each model's rank among the models on sale today, for each kind of work, from our own benchmarks and licensed sources. Further right is better; the better rank is in green.
Every shared result
Each model's best result on every measure both have, grouped by benchmark, with the setting that produced it. Under each measure, every model that benchmark has measured is a grey tick, best to the right, so you can see where the two sit in the field. The headline measures of each benchmark come first; the rest are under "Show all". Green marks the better value; where a source reports ranges that overlap, neither is marked.
| Measure | GPT-6.1 Sol | Inkling Small |
|---|---|---|
| BulletBench measured by Spring Prompt · 3 results | ||
| Cost per game · Bullet 60sUS dollars, lower is better 22 · 15 of 28 measured | $0.0210 | $0.0075no reasoning |
| Ladder Elo · Bullet 60sladder Elo, higher is better 2 · 11 of 28 measured | 928Ultrafast (low reasoning) | 529no reasoning |
| Ladder Elo · Lightning 10+1ladder Elo, higher is better 5 · 7 of 23 measured | 584Ultrafast (low reasoning) | 571no reasoning |
| Arena (formerly LMArena) reported by Arena (formerly LMArena) · 3 results | ||
| Overall · TextArena rating, higher is better 18 · 131 of 387 measured | 1,483max reasoning | 1,405 |
| Overall · Text factualityArena rating, higher is better 37 · 104 of 163 measured | 1,463max reasoning | 1,426 |
| Business, management and finance · TextArena rating, higher is better 27 · 125 of 380 measured | 1,475max reasoning | 1,409 |
| Artificial Analysis reported by Artificial Analysis · 3 results | ||
| Artificial Analysis Intelligence Indexindex score, higher is better 6 · 70 of 243 measured | 51.8max reasoning | 25.7 |
| Humanity's Last Exam% of questions, higher is better 8 · 67 of 242 measured | 52.9%max reasoning | 33.3% |
| Terminal-Bench 4.0% of tasks, higher is better 5 · 52 of 112 measured | 56.1%max reasoning | 1.0% |
| SimpleQA Verified (Epoch AI) reported by SimpleQA Verified (Epoch AI) · 1 result | ||
| Correct answers% of questions, higher is better 2 · 66 of 76 measured | 73.9%max reasoning | 19.1%xhigh reasoning |
Show all 29 results (19 more)
| Measure | GPT-6.1 Sol | Inkling Small |
|---|---|---|
| BulletBench measured by Spring Prompt · 7 results | ||
| Cost per game · Lightning 10+1US dollars, lower is better 23 · 16 of 23 measured | $0.16Ultrafast | $0.0077no reasoning |
| Games lost on time · Bullet 60s% of games, lower is better 13 · 1 of 28 measured | 25.0%Ultrafast (low reasoning) | 0.0%no reasoning |
| Games lost on time · Lightning 10+1% of games, lower is better 16 · 1 of 23 measured | 50.0%Ultrafast (low reasoning) | 0.0%no reasoning |
| Invalid moves · Bullet 60s% of moves, lower is better 1 · 28 of 28 measured | 0.0% | 7.2%no reasoning |
| Invalid moves · Lightning 10+1% of moves, lower is better 1 · 23 of 23 measured | 0.0%Ultrafast | 5.3%no reasoning |
| Median move time · Bullet 60smilliseconds, lower is better 18 · 7 of 28 measured | 1.4 sUltrafast (low reasoning) | 0.6 sno reasoning |
| Median move time · Lightning 10+1milliseconds, lower is better 19 · 8 of 23 measured | 1.2 sUltrafast (low reasoning) | 0.6 sno reasoning |
| Arena (formerly LMArena) reported by Arena (formerly LMArena) · 8 results | ||
| Confirmed task success · AgentIPS effect estimate, higher is better 2 · 46 of 48 measured | 0.15max reasoning, arena agent | -0.20arena agent |
| Creative writing · TextArena rating, higher is better 21 · 192 of 385 measured | 1,460max reasoning | 1,311 |
| Expert prompts · TextArena rating, higher is better 4 · 106 of 338 measured | 1,543max reasoning | 1,445 |
| Instruction following · TextArena rating, higher is better 10 · 134 of 387 measured | 1,490max reasoning | 1,394 |
| Praise over complaint · AgentIPS effect estimate, higher is better 6 · 46 of 48 measured | 0.26max reasoning, arena agent | -0.22arena agent |
| Steerability · AgentIPS effect estimate, higher is better 3 · 48 of 48 measured | 0.11max reasoning, arena agent | -0.14arena agent |
| Tool grounding · AgentIPS effect estimate, higher is better 1 · 40 of 48 measured | 0.00max reasoning, arena agent | -0.00arena agent |
| Writing, literature and language · TextArena rating, higher is better 17 · 175 of 386 measured | 1,472max reasoning | 1,342 |
| Artificial Analysis reported by Artificial Analysis · 4 results | ||
| Long-context reasoning (AA-LCR)% of questions, higher is better 6 · 76 of 233 measured | 84.0%low reasoning | 75.7% |
| Output speedtokens per second, higher is better 58 · 15 of 74 measured | 55.2max reasoning | 173 |
| SciCode% of problems, higher is better 22 · 50 of 113 measured | 55.8%high reasoning | 49.7% |
| Time to first answer tokenseconds, lower is better 36 · 49 of 74 measured | 1.69low reasoning | 13.9 |
Compare them with other models
- GPT-6.1 Sol vs Claude Opus 5.5Most intelligent at $3–10 per million tokens
- GPT-6.1 Sol vs Muse Spark 1.3Cheapest with similar intelligence
- GPT-6.1 Sol vs GPT-6 AstraJust below overall
- Inkling Small vs Gemini 3.5 Flash-LiteFastest with similar intelligence
- Inkling Small vs Claude Opus 5.5Most intelligent available today
Quick answers
Is GPT-6.1 Sol better than Inkling Small?
Pick GPT-6.1 Sol if quality matters most: it scores higher (Intelligence Index 51.8 against 25.7). Pick Inkling Small if cost matters more: it costs 2.8 times less per game of bullet chess on BulletBench. Inkling Small is also faster.
Which is cheaper, GPT-6.1 Sol or Inkling Small?
Inkling Small is cheaper to run: $0.007 against $0.021 per game of bullet chess on BulletBench (2.8 times less).
Which is faster, GPT-6.1 Sol or Inkling Small?
Inkling Small writes about 173 tokens a second on its usual API, against 55 for GPT-6.1 Sol (Artificial Analysis).
Which is better for agents and tool use, GPT-6.1 Sol or Inkling Small?
GPT-6.1 Sol ranks 3 of 164 models on sale for multi-step tasks with tools: support desks, coding agents, function calls, against 71 for Inkling Small.
Which is better for reasoning and knowledge, GPT-6.1 Sol or Inkling Small?
GPT-6.1 Sol ranks 5 of 198 models on sale for hard questions across science, maths and general knowledge, against 61 for Inkling Small.
Which is better for writing, GPT-6.1 Sol or Inkling Small?
GPT-6.1 Sol ranks 15 of 188 models on sale for what people prefer in blind comparisons, and judged writing quality, against 103 for Inkling Small.
Which is better for sticking to the facts, GPT-6.1 Sol or Inkling Small?
GPT-6.1 Sol ranks 18 of 152 models on sale for summarising without inventing things, and factual answers, against 127 for Inkling Small.
Which has the bigger context window, GPT-6.1 Sol or Inkling Small?
GPT-6.1 Sol: 1,050,000 tokens, against 524,288 for Inkling Small.
Run GPT-6.1 Sol and Inkling Small on your own prompt
Benchmarks aren't your data. Try both side by side in the playground, with the cost of every answer.