Endpoint · inferenceGETmodelprices.xyz /llm/cheapest/reasoning
Cheapest reasoning-model leaderboard: the 50 lowest-cost AI models with extended reasoning / chain-of-thought support, ranked by inference cost per token — o3, Claude 5 thinking…
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Cheapest reasoning-model leaderboard: the 50 lowest-cost AI models with extended reasoning / chain-of-thought support, ranked by inference cost per token — o3, Claude 5 thinking, Gemini 3 Pro, DeepSeek R1, Qwen QwQ and more across 70+ providers. Input, output and cache USD per 1M tokens with context windows joined in. Refreshed hourly.Overview
Grade?
UNRATED
0 of 30 paid calls toward a letter
Price
$0.01 per call
Paid calls
none yet
delivery unknown until someone pays
More info
Seller?
URL
https://modelprices.xyz/llm/cheapest/reasoning
Seen
first 35 days ago · last 16 hr ago
63 free handshakes
Payment
Pays through
x402
Offered on?
Base USDC
Listed on?
Base
Score, from free handshakes onlyweights 2026.09.6
UN
RATED
RATED
0.808 liveness verified, no letter
To a letter · 30 paid calls
0 of 30
Held back by sample size, not by the seller · gap to 1.000 is 0.192: 0.142 uncertain ? + 0.050 short ? · 0.092 to A
| Component | Weight | Measured | Lower bound ? | Adds | Short ? | Uncertain ? | |
|---|---|---|---|---|---|---|---|
| latency p95costs the most it answered as fast as its class |
0.20 | 0.75 | 0.370 | 0.074 | −0.050 | −0.076 | |
| liveness it answered at all |
0.60 | 1.00 | 0.890 | 0.534 | 0 | −0.066 | |
| price stability the price stayed where it was listed |
0.20 | 1.00 | 1.000 | 0.200 | 0 | 0 | |
| Composite | 1.00 | 0.808 | gap to 1.000 = 0.192 · 0.050 short · 0.142 uncertain | 0.808 | −0.050 | −0.142 |
Not measured: correctness · nobody paid; honesty · nobody paid; schema conformance · no answer had a published shape to check
The multiplication, written out
0.200 × 0.370 latency p95
+ 0.600 × 0.890 liveness
+ 0.200 × 1.000 price stability
= 0.808 → UNRATED: 56 of 30 paid calls weights 2026.09.6 · 56 samples · seed cap_01M1A5AFTDBG87G8SS7HQFNRAB|2026-09-04T04:33:24.670Z|2026.09.6
Verify it yourself
npx teppi-check https://modelprices.xyz/llm/cheapest/reasoningcurl -s https://api.teppi.xyz/v1/trust/cap_01M1A5AFTDBG87G8SS7HQFNRAB