GPT-6 and GPT-5.6 SVG reasoning-effort comparison

Prices per 1M input/output tokens: Astra $10/$50, Sol $5/$30, Terra $2.50/$15, Luna $1/$6.

Effort	gpt-6-astra	gpt-5.6-sol	gpt-5.6-terra	gpt-5.6-luna
max	16 input tokens, 12,638 output = 63.21 cents	26 input tokens, 16,180 output = 48.55 cents	26 input tokens, 21,390 output = 32.09 cents	16 input tokens, 13,040 output = 7.83 cents
xhigh	16 input tokens, 6,766 output = 33.85 cents	26 input tokens, 8,033 output = 24.11 cents	26 input tokens, 9,776 output = 14.67 cents	16 input tokens, 7,072 output = 4.24 cents
high	16 input tokens, 3,671 output = 18.37 cents	26 input tokens, 3,454 output = 10.38 cents	26 input tokens, 2,486 output = 3.74 cents	16 input tokens, 4,098 output = 2.46 cents
medium	16 input tokens, 2,560 output = 12.82 cents	26 input tokens, 3,511 output = 10.55 cents	26 input tokens, 2,302 output = 3.46 cents	16 input tokens, 2,089 output = 1.26 cents
low	16 input tokens, 1,906 output = 9.55 cents	26 input tokens, 2,772 output = 8.33 cents	26 input tokens, 2,312 output = 3.47 cents	16 input tokens, 1,258 output = 0.76 cents
none	Not available	26 input tokens, 1,961 output = 5.90 cents	26 input tokens, 1,731 output = 2.60 cents	16 input tokens, 1,176 output = 0.71 cents