Nine current flash-tier models: list price, and what a correct answer cost
Bands by vendor output price on 2026-09-17. Bar: measured cost per correct answer at the best thinking setting (11 tasks x 3). Label: list price in / out, cache read as a share of input.
Top band: $10 to $12 output
Claude Sonnet 5
$0.00763 per correct answer, 33/33 at max | list $2 in / $10 out, cache read 10%
GPT-5.6 Terra
$0.00199 per correct answer, 33/33 at low | list $2 in / $12 out, cache read 10%
Middle band: $1.20 to $3.75 output
GPT-5.6 Luna
$0.00052 per correct answer, 32/33 at max | list $0.2 in / $1.2 out, cache read 10% invents at default
DeepSeek V4.1 Flash
$0.00084 per correct answer, 33/33 at low | list $0.3 in / $1.2 out, cache read 2% invents at default
Gemini 3.8 Flash
$0.00234 per correct answer, 33/33 at low | list $0.75 in / $3.75 out, cache read 10%
Bottom band: $0.40 to $0.53 output
Seed 2.0 Mini
$0.00157 per correct answer, 33/33 at default | list $0.1 in / $0.4 out, cache read 20%
Qwen3.8 Flash
$0.00046 per correct answer, 33/33 at default | list $0.15 in / $0.47 out, cache read 11%
GLM 5.3 Flash
$0.00041 per correct answer, 31/33 at default | list $0.15 in / $0.5 out, cache read 20%
Hy3
$0.00069 per correct answer, 33/33 at low | list $0.132 in / $0.528 out, cache read 25%
closed model
open weights
Red: invented 4 of 5 answers at the default setting, see the admission test. Gemini Flash prices double on Jan 1, 2027; DeepSeek is half price off-peak.