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GPT-5.6 Sol vs GPT-5.6 Terra

Side-by-side API economics and benchmarks. Per-1M input and output rates, context window, and verified metrics.

Tale of the tape

Head-to-head specs pulled from each model profile.

Metric GPT-5.6 Sol GPT-5.6 Terra
Input cost / 1M $5.00 $2.50
Output cost / 1M $30.00 $15.00
Context window 1,050,000 tokens 1,050,000 tokens
MMLU score

Cost verdict

Enter monthly input and output volumes to see total cost savings.

GPT-5.6 Sol

Input: 1M × $5.00 = $5.00
Output: 1M × $30.00 = $30.00
Total
$35.00

GPT-5.6 Terra

Input: 1M × $2.50 = $2.50
Output: 1M × $15.00 = $15.00
Total
$17.50

Total cost savings

$17.50

GPT-5.6 Terra saves $17.50 per month vs the other model at this volume.

Model routing savings

Uses this page's verified rates. GPT-5.6 Sol is the premium route (higher combined per-1M cost); GPT-5.6 Terra handles routine traffic.

Premium model

GPT-5.6 Sol

$5.00 in · $30.00 out / 1M

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Economical model

GPT-5.6 Terra

$2.50 in · $15.00 out / 1M

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All premium

GPT-5.6 Sol

$1,750.00

100% of input and output on the premium route

Routed stack

80%GPT-5.6 Terra

GPT-5.6 Sol

$1,050.00

Routine slice
$700.00
Premium slice
$350.00

Monthly savings

$700.00

40% lower

Rates pulled from this page's model database entries (gpt-5-6-sol, gpt-5-6-terra) — same per-1M input/output figures as Tale of the tape. Production routing needs quality gates and monitoring.

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