deepseek-v4.1-flash-heretic

Uncensored DeepSeek V4.1 Flash with a 1M-token context and image input. OpenAI-compatible, no account needed.

$0.4125 per million input tokens · $1.65 per million output tokens

Endpoint POST https://api.flashctx.xyz/v1/chat/completions · model deepseek-v4.1-flash-heretic · OpenAI-compatible, so any OpenAI SDK or client works.

Typical job: 100 chat turns of 2,000 in / 500 out ≈ $0.17. Prepaid credit, no subscription. Prices checked 2026-11-12.

launch price — 50% off — half the usual rate while the service fills up; reverts to $0.825 / $3.30 per M

Try it free — 3 steps, no signup

1. Get a key
$0.10 of credit · one per day · no email, no card

Buy credit — $1 or more

Pick an amount and a payment method. Your key appears right here when the payment lands; the same key works for every request until the credit runs out.

$
Telegram Stars+35%, in the bot

Not sure yet? Get a free $0.10 key — issued instantly, no card.

Fees, minimums and identity checks
MethodMinWhat you may be asked
Card$6Name, date of birth and address at checkout (the card processor's check).
Card · US
ePayVista, processed by Stripe		$5No account. Stripe runs its own checks on first-time buyers; for some US customers that includes date of birth and Social Security number.
PayPal · US
via PayGate		$5No PayPal account needed: guest checkout takes a card. PayPal can still ask you to verify your identity or link a bank.
Crypto$1+Nothing. Exchange fees taken out of the amount are fine: what arrives is credited. Minimums per network below.
Telegram Stars$1Nothing beyond Telegram. Stars carry a +35% offset (Telegram and the app stores keep about a third): $5 of credit is 520 stars.

Identity checks, where they happen, are run by the payment company; we never see them. Monero: email us.

Crypto networks and addresses
CoinNetworkMinAddress
USDTTron (TRC-20)$2TKxm5L5MgPaPYX2gGNJ98b4rGixYRWWFgw
USDTBNB Chain (BEP-20)$10x5Ab610B2C88438548b03511b943BeBF4C324348e
USDTSolana$1A1Sx2meGf3Q7Kjq6qfqyNVxnyqWNcduUSMMgPpjiHwUN
USDTArbitrum$10x5Ab610B2C88438548b03511b943BeBF4C324348e
USDTPolygon$10x5Ab610B2C88438548b03511b943BeBF4C324348e
USDTEthereum (ERC-20)$100x5Ab610B2C88438548b03511b943BeBF4C324348e
USDCBase$10x5Ab610B2C88438548b03511b943BeBF4C324348e
USDCSolana$1A1Sx2meGf3Q7Kjq6qfqyNVxnyqWNcduUSMMgPpjiHwUN
USDCArbitrum$10x5Ab610B2C88438548b03511b943BeBF4C324348e
USDCPolygon$10x5Ab610B2C88438548b03511b943BeBF4C324348e
USDCBNB Chain (BEP-20)$10x5Ab610B2C88438548b03511b943BeBF4C324348e
USDCEthereum (ERC-20)$100x5Ab610B2C88438548b03511b943BeBF4C324348e
BTCBitcoin$5bc1qvrjtc9xuwnkq32aac493x627m9sgs65akvgsku
ETHBase$10x5Ab610B2C88438548b03511b943BeBF4C324348e
ETHArbitrum$10x5Ab610B2C88438548b03511b943BeBF4C324348e
ETHEthereum$100x5Ab610B2C88438548b03511b943BeBF4C324348e
SOLSolana$1A1Sx2meGf3Q7Kjq6qfqyNVxnyqWNcduUSMMgPpjiHwUN
BNBBNB Chain$10x5Ab610B2C88438548b03511b943BeBF4C324348e
LTCLitecoin$1ltc1qq6h4kajfzwqt6hczlj092wfmffdthp2fle69s2
TRXTron$1TKxm5L5MgPaPYX2gGNJ98b4rGixYRWWFgw
DOGEDogecoin$2D5DcJsWppXH7ShuZJxX3uebXuCpUKsFyVH
ZECZcash (shielded)$1u1gzfq208q7lsgla5aaay9jhzswtfwq30upy0x58p37t2txrkg59s6c7kf8m3zk5m8pvfujrv6plkuvt4apur6ycgmzctac5s8v8whvxvylz5sclf566rm9736kmppzunl9uepgzgevuyseeqm64y3wfq2vzqhyuyjpxxj2ycdp5ew35ja
ZECZcash (transparent)$1t1Hsou1ejiVawyWkVD2jLhqPCGh1xHEWHan

Stablecoins count 1:1 in USD; other coins are priced at the live market rate when you press the button. Start from the Crypto button above so the payment is tied to your key. All EVM networks share one address. Monero: email us.

Paid already, but closed the page?

This browser remembers your order. On another device, paste the claim token shown when you paid.

Use it from your own code

# curl — nothing to install
curl -s https://api.flashctx.xyz/v1/chat/completions \
  -H "Authorization: Bearer sk-…" -H "Content-Type: application/json" \
  -d '{"model":"deepseek-v4.1-flash-heretic","messages":[{"role":"user","content":"hello"}],"stream":true}'
# python — the stock openai SDK, pointed at this endpoint
from openai import OpenAI
c = OpenAI(base_url="https://api.flashctx.xyz/v1", api_key="sk-…", timeout=600)
for chunk in c.chat.completions.create(model="deepseek-v4.1-flash-heretic", stream=True,
        messages=[{"role":"user","content":"hello"}]):
    print(chunk.choices[0].delta.content or "", end="")

Streaming is recommended: one request streams at about 65 tokens/s. Images go in as data: URIs. Up to 8K output and 256K input tokens per request. Prompts are kept 14 days and never used for training.

For developers: pay per request (x402), measured speed, long requests

Per request, no key (x402)

curl -s -X POST https://api.flashctx.xyz/v1/chat/completions \
  -H 'Content-Type: application/json' \
  -d '{"model":"deepseek-v4.1-flash-heretic","messages":[{"role":"user","content":"hi"}],"max_tokens":128,"stream":true}'
# 402 -> pay the quoted USDC amount -> retry with X-PAYMENT: <base64 payload>

Measured on this node (2026-11-12)

WorkloadResult
Prefill, single stream5.7k tok/s at a 6K prompt · 7.2k at 23K · 7.6k at 69K
Time to first token0.2 s short prompt · 1.0 s at 6K · 3.2 s at 23K · 9 s at 69K
Decode, one stream~65 tok/s
Decode, aggregate~150 tok/s at 4 concurrent · ~200 at 8 · ~320 at 16 (the most served at once; ~21 tok/s each)

Long non-streaming requests

If an answer takes more than ~20 s, the server sends the 200 headers early and pads the body with leading spaces until the JSON is ready (still valid JSON). Use a read timeout of at least 10 minutes. Errors on such requests arrive as an {"error": …} body with status 200. Full guide: agent.md.

Questions, refunds or a custom rate: agent@flashctx.xyz — a human reads it.