If you already build on OpenAI, both GPT-6.1 Terra (Max) and GPT-6 Sol (Max) are on the menu, and they are not interchangeable. Everything below is read from the benchmark, price and speed data in Franklin AI's catalogue; nothing here comes from a hands-on test. The biggest separation is in overall capability: 51.3 for GPT-6.1 Terra Max against 44.2 for GPT-6 Sol Max.
The headline benchmark
On the intelligence index, GPT-6.1 Terra Max scores 51.3 against 44.2 for GPT-6 Sol Max. A lead of this size is hard to dismiss as noise. Put another way, GPT-6 Sol Max would need 16% more on this index to draw level.
For context, that places GPT-6.1 Terra Max 14th and GPT-6 Sol Max 26th out of 109 scored models still on offer.
Neither model has a separate coding or math index recorded yet, so those narrower comparisons will have to wait for more data.
When they came out
GPT-6.1 Terra Max arrived on October 26, 2026, 34 days after GPT-6 Sol Max (September 22, 2026). That is close enough to count them as the same generation.
Running costs
GPT-6.1 Terra Max lists $1.00 per million input tokens and $5.00 per million output tokens; GPT-6 Sol Max lists $2.00 and $10.00. That makes GPT-6.1 Terra Max's output 50% cheaper.
A reference job of 1 million input tokens and 200,000 output tokens costs $2.00 with GPT-6.1 Terra Max and $4.00 with GPT-6 Sol Max, so GPT-6.1 Terra Max saves $2.00. A bigger example, an agent that reads 50 million tokens and writes 5 million in a month, costs $75.00 on GPT-6.1 Terra Max and $150 on GPT-6 Sol Max: a gap of $75.00.
Throughput and time to first token
GPT-6.1 Terra Max generates about 114 tokens per second and GPT-6 Sol Max about 127 tokens per second. On long outputs, that is a real advantage for GPT-6 Sol Max. Before any text appears, GPT-6.1 Terra Max takes 6.2 minutes and GPT-6 Sol Max 91 seconds. GPT-6 Sol Max gets to its first token 4.1 times as fast. A first-token wait of that length suits background work better than live conversation.
For a 1,500-token response, first token plus generation comes to roughly 6.4 minutes on GPT-6.1 Terra Max and 103 seconds on GPT-6 Sol Max.
Value for money
Dividing the blended price by the intelligence index gives a rough cost per point: $0.039 for GPT-6.1 Terra Max and $0.090 for GPT-6 Sol Max, per million tokens. With the higher score and the lower cost per point, GPT-6.1 Terra Max is the better value per point on these numbers.

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