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Pricing & PlansBy TyporaAI6 min readUpdated

OpenAI vs Claude vs Grok API Cost for Academic Papers

TL;DR

On TyporaAI's $5.99/month BYOK plan, a 10k-input / 10k-output multi-pass paper run costs $0.0145 on GPT-5.4 Nano, $0.08 on Grok 4.5, $0.175 on GPT-5.6 Terra, or $0.18 on Claude Sonnet 5—compared with 2 million monthly tokens included in $9.99/month Pro.

How much does a long-form paper actually cost in API tokens across OpenAI, Anthropic Claude, and xAI Grok? Here is the exact per-paper math across all 11 models supported on TyporaAI's $5.99/month BYOK plan versus $9.99/month Pro.

Developer laptop workspace displaying technical configuration and notes
Photo: Crew via Wikimedia Commons (CC0 1.0 Public Domain)

Key takeaways

  • TyporaAI's Bring-Your-Own-Key plan costs $5.99/month ($49.99/year, about $4.17/month) versus $9.99/month ($99.99/year, about $8.33/month) for Pro with 2 million monthly tokens included—a $4.00/month monthly software difference [1].
  • TyporaAI supports 11 developer models across three providers: OpenAI (GPT-5.6 Sol, GPT-5.6 Terra, GPT-5.6 Luna, GPT-5.4 Nano), Anthropic (Claude Fable 5, Claude Opus 5, Claude Sonnet 5, Claude Haiku 4.5), and xAI (Grok 4.5, Grok 4.3, Grok Build) [2] [3].
  • On a heavy multi-pass benchmark (10,000 input tokens + 10,000 output tokens covering drafting plus up to two humanizer passes), provider API cost ranges from $0.0145 (1.45 cents) on GPT-5.4 Nano to $0.175 on GPT-5.6 Terra, $0.18 on Claude Sonnet 5, and $0.60 on Claude Fable 5 [3] [4].
  • At balanced default models (GPT-5.6 Terra at $0.175 or Claude Sonnet 5 at $0.18 per 20k-token run), the $4.00/month gap between BYOK and Pro breaks even at 22 heavy paper runs per month [1] [3].
  • Your API key stays stored locally on your Mac or Windows PC and talks directly to OpenAI, Anthropic, or xAI with zero TyporaAI token markup [2].

Per-paper token math across all 11 OpenAI, Claude, and Grok models

Published API pricing pages quote rates per million (1,000,000) input and output tokens, which makes it unnecessarily hard to picture what a single 1,500-to-2,500-word paper actually costs [5] [6] [7]. When Make it sound human is enabled in TyporaAI, a run drafts the paper and may send flagged prose for up to two extra rewrite calls—so modeling 10,000 input tokens (0.01M) plus 10,000 output tokens (0.01M) gives a realistic upper-bound benchmark for a multi-pass paper with instructions and writing samples [3] [4].

Published USD rates per 1M tokens and exact cost for a 10,000-input + 10,000-output token paper run across TyporaAI's 11 catalog models
Provider & ModelTierInput / Output per 1M TokensCost per 20k-Token RunRuns Equal to $4.00/mo Gap
OpenAI GPT-5.4 NanoCheapest$0.20 / $1.25 [3]$0.0145 (1.45¢)275 runs
xAI Grok BuildCheapest$1.00 / $2.00 [3]$0.0300 (3.0¢)133 runs
xAI Grok 4.3Balanced$1.25 / $2.50 [3]$0.0375 (3.75¢)106 runs
Claude Claude Haiku 4.5Cheapest$1.00 / $5.00 [3]$0.0600 (6.0¢)66 runs
OpenAI GPT-5.6 LunaCheap$1.00 / $6.00 [3]$0.0700 (7.0¢)57 runs
xAI Grok 4.5 (xAI default)Best$2.00 / $6.00 [3]$0.0800 (8.0¢)50 runs
OpenAI GPT-5.6 Terra (OpenAI default)Balanced$2.50 / $15.00 [3]$0.1750 (17.5¢)22 runs
Claude Claude Sonnet 5 (Claude default)Balanced$3.00 / $15.00 [3]$0.1800 (18.0¢)22 runs
Claude Claude Opus 5Best$5.00 / $25.00 [3]$0.3000 (30.0¢)13 runs
OpenAI GPT-5.6 SolBest$5.00 / $30.00 [3]$0.3500 (35.0¢)11 runs
Claude Claude Fable 5Best$10.00 / $50.00 [3]$0.6000 (60.0¢)6 runs

Comparing the three provider default models head to head

When you paste an sk- (OpenAI), sk-ant- (Anthropic), or xai- (xAI) secret key on the API keys screen, TyporaAI preselects each provider's recommended writing default: GPT-5.6 Terra, Claude Sonnet 5, or Grok 4.5 [2] [3]. Output tokens cost three to six times more than input tokens on all three defaults because generating new prose and humanizer rewrites is compute-heavy [3] [4].

Cost in cents for ten 20k-token paper runs across default & flagship models

GPT-5.4 Nano (budget floor)14.5¢ ($0.15)
10 full multi-pass runs for under 15 cents [3]
Grok 4.5 (xAI default)80¢ ($0.80)
$2 input / $6 output per 1M tokens [3]
GPT-5.6 Terra (OpenAI default)175¢ ($1.75)
$2.50 input / $15 output per 1M tokens [3]
Claude Sonnet 5 (Claude default)180¢ ($1.80)
$3 input / $15 output per 1M tokens [3]
Claude Fable 5 (flagship ceiling)600¢ ($6.00)
$10 input / $50 output per 1M tokens [3]
Direct provider API usage for ten 20k-token runs (100k input + 100k output tokens total) as of 2026-10-26 [3].

Decision rule: when $5.99 BYOK beats $9.99 Pro (and when it does not)

Remember that consumer chat subscriptions—ChatGPT Plus, Claude Pro, and X Premium—do not grant developer API keys [2]. To use the $5.99/month ($49.99/year) Bring-Your-Own-Key plan, you add a small prepaid balance on platform.openai.com, console.anthropic.com, or console.x.ai [2].

  • Choose BYOK ($5.99/mo or $49.99/yr) if you already maintain an OpenAI, Claude, or xAI developer key, write fewer than 22 heavy papers a month on GPT-5.6 Terra or Claude Sonnet 5 (or up to 50 on Grok 4.5), or want direct access to specific model tiers [1] [2] [3].
  • Choose Pro ($9.99/mo or $99.99/yr) if you want 2 million monthly tokens ready immediately after email/password sign-in without creating a developer console account, managing secret keys, or watching per-token invoices [1] [2].
  • Zero lock-in on features: Live typing speed presets (30 to 150 words per minute), the 0 to 100 humanizer, and the Testing Simulator work identically on every plan [1] [8] [9]. Follow step-by-step key creation on How to get your API key [2].

Summary and responsible use

Transparent token math makes choosing between BYOK ($5.99/month) and Pro ($9.99/month with 2 million monthly tokens) straightforward: light-to-moderate API users save every month with a local key, while frequent writers and non-technical buyers come out ahead with bundled Pro tokens [1] [3]. Compare all four billing options on the pricing page or read our companion 2026 Pro vs API-key plan guide [1].

For educational and permitted writing support only. Use TyporaAI only where AI assistance and typing simulation are allowed by your school, employer, or platform.

TyporaAI has not commissioned independent third-party editorial review of this article.

Review our responsible-use and editorial standards and our API key setup walkthrough before connecting a provider key.

To report a factual error or outdated figure in this guide, email admin@typoraAI.com with the article URL and section heading.

Sources: 9 entries, primary documentation and verified technical references, last reviewed 2026-10-26.

Frequently asked questions

Which API model is the cheapest for running papers in TyporaAI?

OpenAI's GPT-5.4 Nano ($0.20 per 1M input tokens and $1.25 per 1M output tokens, or about 1.45 cents for a 20k-token multi-pass run) and xAI's Grok Build ($1.00 input / $2.00 output, or 3.0 cents per 20k-token run) are the lowest-cost options in the catalog.

How many papers per month make $9.99/month Pro cheaper than $5.99/month BYOK?

On balanced default models like GPT-5.6 Terra (17.5 cents per 20k-token run) or Claude Sonnet 5 (18.0 cents per 20k-token run), about 22 heavy runs cover the $4.00/month subscription difference—while Pro includes 2 million monthly tokens with zero API key setup.

Does TyporaAI add a markup on top of OpenAI, Claude, or xAI token prices?

No. On Bring-Your-Own-Key plans, your API key stays on your computer and calls OpenAI, Anthropic, or xAI directly, so your provider bills raw token usage with zero TyporaAI markup.

Sources (9)

  1. TyporaAI: TyporaAI: Pricing and subscription plans (Pro vs Bring-Your-Own-Key)
  2. TyporaAI: TyporaAI: How to get your OpenAI, Claude, or xAI API key
  3. TyporaAI: TyporaAI Desktop Model Catalog (/api/models published rates)
  4. TyporaAI: TyporaAI: Step-by-step desktop app tutorial (Make it sound human call notes)
  5. OpenAI: OpenAI Developer Platform: API Pricing
  6. Anthropic: Anthropic Claude Platform Docs: Pricing
  7. xAI: xAI Developer Docs: API Pricing
  8. TyporaAI: TyporaAI: Built-in AI humanizer and 0–100 style score
  9. TyporaAI: TyporaAI: Testing Simulator guide
Typing Mechanics

Why AI Drafts Sound Robotic: Cadence and Transitions

Unedited AI drafts sound flat because language models favor high-probability phrasing and uniform sentence cadence; TyporaAI scores those traits from 0 to 100 and rewrites them at Light, Standard, or Heavy strength while preserving citations.

Read guide

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