GPT-5.6 Terra Max vs GPT-6.1 Sol Max compared

GPT-6.1 Sol Max leads the intelligence index 54.6 to 32.3. GPT-6.1 Sol Max costs 11% less on blended price. Benchmarks, sample bills, speed and a verdict.

Metric	GPT-5.6 Terra (Max)	GPT-6.1 Sol (Max)
Intelligence Index	32.3	54.6
Input price (per 1M tokens)	$2.00	$2.00
Output price (per 1M tokens)	$12.00	$10.00
Output speed (tokens/s)	116	60
Time to first token	3.4 min	5.4 min
Release date	2026-07-09	2026-09-29

Metric

GPT-5.6 Terra (Max)

GPT-6.1 Sol (Max)

Intelligence Index

32.3

54.6

Input price (per 1M tokens)

$2.00

Output price (per 1M tokens)

$12.00

$10.00

Output speed (tokens/s)

116

Time to first token

3.4 min

5.4 min

Release date

2026-07-09

2026-09-29

GPT-5.6 Terra (Max) and GPT-6.1 Sol (Max) share a maker, OpenAI, but not a price sheet or a benchmark profile. GPT-6.1 Sol Max leads the intelligence index 54.6 to 32.3, a gap of 22.3 points. What follows is built entirely from tracked data, so where the catalogue is silent, this page says so instead of guessing.

Benchmark scores

GPT-6.1 Sol Max comes out ahead on the intelligence index, 54.6 to 32.3. A gap this large suggests the two are built for different jobs. In relative terms, GPT-6.1 Sol Max scores 69% higher.

For context, that places GPT-5.6 Terra Max 46th and GPT-6.1 Sol Max 8th out of 109 scored models still on offer.

Specialist coding and math indexes are missing for both, so treat the overall score as the only capability signal here.

Speed and latency

Once a response is under way, GPT-5.6 Terra Max produces roughly 116 tokens per second against 60 tokens per second for GPT-6.1 Sol Max. GPT-5.6 Terra Max is ahead by 95% on throughput. Time to first token is 3.4 minutes for GPT-5.6 Terra Max and 5.4 minutes for GPT-6.1 Sol Max. GPT-6.1 Sol Max waits 1.6 times as long before its first token. A first-token wait of that length suits background work better than live conversation.

For a 400-token response, first token plus generation comes to roughly 3.5 minutes on GPT-5.6 Terra Max and 5.5 minutes on GPT-6.1 Sol Max.

Running costs

The list prices are $2.00 in and $12.00 out for GPT-5.6 Terra Max, and $2.00 in and $10.00 out for GPT-6.1 Sol Max, per million tokens. That makes GPT-6.1 Sol Max's output 17% cheaper.

For a sample workload of 1 million input tokens and 200,000 output tokens, GPT-5.6 Terra Max would cost $4.40 and GPT-6.1 Sol Max $4.00, a difference of $0.40. For a chat app with 50,000 sessions of 800 input and 300 output tokens, GPT-6.1 Sol Max would come in 12% lower: $260 for GPT-5.6 Terra Max against $230 for GPT-6.1 Sol Max.

Is the price in proportion?

Dividing the blended price by the intelligence index gives a rough cost per point: $0.14 for GPT-5.6 Terra Max and $0.073 for GPT-6.1 Sol Max, per million tokens. GPT-6.1 Sol Max scores higher and costs less per point, so on price per point there is nothing to trade off.

Release timing

GPT-6.1 Sol Max arrived on September 29, 2026, about 3 months after GPT-5.6 Terra Max (July 9, 2026).

Frequently asked questions

Is GPT-5.6 Terra Max better than GPT-6.1 Sol Max?

Not across the board: GPT-6.1 Sol Max scores higher on the intelligence index, 54.6 to 32.3; GPT-6.1 Sol Max is 11% cheaper on blended price; and GPT-5.6 Terra Max streams output 1.9 times as fast.

Is GPT-6.1 Sol Max cheaper than GPT-5.6 Terra Max?

GPT-6.1 Sol Max is cheaper on a blended basis. GPT-5.6 Terra Max lists $2.00 per million input tokens and $12.00 per million output tokens; GPT-6.1 Sol Max lists $2.00 and $10.00. For 1 million input and 200,000 output tokens that is $4.40 against $4.00.

Where do these numbers come from?

The figures are the recorded benchmark, price and speed data in Franklin AI's model catalogue. This page is written from that data automatically; neither model was tested by hand for it.

Which is faster, GPT-5.6 Terra Max or GPT-6.1 Sol Max?

GPT-5.6 Terra Max generates output faster, at 116 tokens per second against 60 tokens per second. GPT-5.6 Terra Max reaches its first token sooner (3.4 minutes against 5.4 minutes).

Who makes GPT-5.6 Terra Max and GPT-6.1 Sol Max?

Both are OpenAI models, listed as separate models in the catalogue. GPT-5.6 Terra Max was released on July 9, 2026 and GPT-6.1 Sol Max on September 29, 2026.

Final whistle

Short answer: GPT-6.1 Sol Max is the stronger all-round pick on this data, while GPT-5.6 Terra Max makes sense in narrower cases. Pick GPT-5.6 Terra Max if long outputs need to finish quickly and users are waiting on the first word. Pick GPT-6.1 Sol Max if you need the higher overall score (54.6 against 32.3) and cost matters ($10.00 against $12.00 per million output tokens).

Where the numbers come from

The scores, speed and prices in this comparison come from independent third-party model evaluations that Franklin AI syncs each day, and the article was written from a snapshot of them. For the latest results, open the GPT-5.6 Terra (Max) and GPT-6.1 Sol (Max) pages. The AI Benchmark methodology explains how that data is collected and shown.