text model comparison
GPT-4.1 vs GPT-6.1 Sol
GPT-4.1 and GPT-6.1 Sol are both current text models, from OpenAI. Both cost $2 per 1M input tokens. On Arena Text, GPT-4.1 scores 1415 Elo and GPT-6.1 Sol 1484 Elo (Arena, measured October 8, 2026). Both accept about 1.05M tokens of context (1,050,000 and 1,047,576).
Data verified October 12, 2026 · Dataset 2026-10-12
Side by side
Standard-tier prices in effect today. The better value in each row is highlighted.
| Fact | GPT-4.1 | GPT-6.1 Sol |
|---|---|---|
| Price per 1M input tokens | $2 | $2 |
| Price per 1M output tokens | $8 (better) | $10 |
| Cost of 10M input and 2M output tokens | $36 (better) | $40 |
| Arena Text | 1415 Elo (#36 of 39) | 1484 Elo (#11 of 39) (better) |
| GPQA Diamond | 66.9% (#35 of 37) | 95.4% (#3 of 37) (better) |
| FrontierMath Tiers 1-3 (v2) | 6% (#37 of 37) | 93.7% (#1 of 37) (better) |
| SimpleQA Verified | 31.1% (#29 of 34) | 73.9% (#2 of 34) (better) |
| Provider | OpenAI | OpenAI |
| Release date | April 14, 2025 | September 29, 2026 |
| Access | API only | API only |
| Context window | 1,047,576 tokens | 1,050,000 tokens |
| Max output | 32,768 tokens | 128,000 tokens |
| Input | text, image | text, image |
| Output | text | text |
When to choose each
GPT-4.1
Best for
- Long-context API trials using text and image inputs
Watch out for
- Not in the pinned LiveBench snapshot; its independent scores here come from Epoch AI's own GPQA Diamond, FrontierMath and SimpleQA Verified runs
GPT-6.1 Sol
Best for
- Agent loops that replay a large cached prefix
- A drop-in alternative to GPT-6 Sol at the same base cost
Watch out for
- The same 272,000-token long-context cliff applies, rebilling the full request at $4 input and $15 output
- Released a week after GPT-6 Sol at identical base pricing, so the two are easy to confuse on a rate card; the cached rate is the difference
GPT-4.1 vs GPT-6.1 Sol FAQ
Which is cheaper, GPT-4.1 or GPT-6.1 Sol?
Both cost $2 per 1M input tokens. For 10M input and 2M output tokens, GPT-4.1 costs $36 and GPT-6.1 Sol $40 at standard rates.
Which scores higher on independent benchmarks, GPT-4.1 or GPT-6.1 Sol?
GPT-6.1 Sol leads on Arena Text, 1484 Elo to 1415 Elo; GPT-6.1 Sol leads on GPQA Diamond, 95.4% to 66.9%; GPT-6.1 Sol leads on FrontierMath Tiers 1-3 (v2), 93.7% to 6%. Scores are independent evaluations, not either vendor's launch figures.
Which has the larger context window, GPT-4.1 or GPT-6.1 Sol?
Both accept about 1.05M tokens of context (1,050,000 and 1,047,576).
Related comparisons
Production evaluation
Choosing between GPT-4.1 and GPT-6.1 Sol?
Public benchmarks narrow the shortlist. We run both on your own tasks, data and cost limits, then build the routing and review controls to run the winner in production.
- A head-to-head evaluation on your real workload
- Routing between models by cost and difficulty