Halfbill Chat · Plans

Every Claude and GPT model, one chat.

Chat without a plan and each message is billed to your chat credits at the per-token price, or pick a Chat plan for a flat monthly fee with a fair-use allowance. Past fair use, chat keeps going from your chat credits. Chat keeps its own balance: top up inside the chat, or switch to one of your organizations to spend its credits.

Halfbill Chat · PlanCHT-ST

Chat Basic

Everyday chat on the standard models

$8/mo

Billed monthly. Prices exclude VAT.

$32 of chat at vendor prices for $8/mo: Thousands of frontier-model messages a month. Past that, messages are billed to your Halfbill credits at the per-token price.

Sonnet 5, Sonnet 4.6, Haiku 4.5, GPT-5.5, GPT-5.6 Terra
$32 of chat at vendor prices every month
Unlimited chat history
Past the allowance, chat continues from your credits

Need company/address details on your invoice? Update billing settings before purchase. We email the invoice automatically after payment.

Chat Plus

Every model, more room

$14/mo

Billed monthly. Prices exclude VAT.

$70 of chat at vendor prices for $14/mo: Thousands of frontier-model messages a month. Past that, messages are billed to your Halfbill credits at the per-token price.

Everything in Chat Basic
Adds Claude Opus 5, Claude Fable 5, GPT-5.6 Sol, GPT-6 Astra
Claude Fable 5.1 included (fair use: up to 8% of your allowance per week)
$70 of chat at vendor prices every month
Files and images in chat
Past the allowance, chat continues from your credits

Need company/address details on your invoice? Update billing settings before purchase. We email the invoice automatically after payment.

Halfbill Chat · PlanCHT-PR

Chat Pro

Every model, the most room

$20/mo

Billed monthly. Prices exclude VAT.

$120 of chat at vendor prices for $20/mo: Thousands of frontier-model messages a month. Past that, messages are billed to your Halfbill credits at the per-token price.

Everything in Chat Basic
Adds Claude Opus 5, Claude Fable 5, GPT-5.6 Sol, GPT-6 Astra
Claude Fable 5.1 included (fair use: up to 10% of your allowance per week)
$120 of chat at vendor prices every month
Priority when limits are tight
Past the allowance, chat continues from your credits

Need company/address details on your invoice? Update billing settings before purchase. We email the invoice automatically after payment.

Priority (-max) models are billed from your credits in every plan.

No plan? Halfbill Chat spends your prepaid credits at the per-token price of the model you pick.

14-day money-back guarantee. Barely used your plan? Refund yourself from your billing history — a full refund while you're under 20% of your allowance, no email needed.

Your allowance refills in full every cycle and any unspent allowance doesn't roll over.

How Chat plans work

Credits or a plan. Without a plan, Halfbill Chat spends your prepaid credits at the per-token price of the model you pick. With a plan, messages within fair use are covered by the monthly fee.
Overflow to credits. When you pass a plan's fair-use allowance, chat continues from your credit balance instead of stopping.
14-day money-back guarantee. If you've used less than 20% of your allowance, refund yourself from your billing history below — no email needed.
Cancel anytime. Your plan stays active until the end of the period you already paid for.
VAT. Prices exclude VAT; VAT is applied at checkout for EU customers.

Per-token prices, top-up packs, and API plans are listed on halfbill.uk/pricing.

Halfbill is an independent service and is not affiliated with, endorsed by, or sponsored by OpenAI or Anthropic. Model names are trademarks of their respective owners.