Comparison
DeepSeek vs Grammarly
DeepSeek vs Grammarly, laid out side by side: pricing model, platforms, available models, core features, and supported formats. Both tools are listed under the Text Generation category, and every field comes from this site's directory records. A pricing model is not an amount.
Quick verdict
DeepSeek: V4.1-Flash and V4-Pro, priced per 1M tokens in peak/off-peak bands; Grammarly: Free/Pro/Enterprise; rewriting and plagiarism detection need Pro. Start with the task you need to finish. Sharing a category does not establish that they are interchangeable; they may serve different stages of a workflow. The conditions and evidence gaps for each follow below.
How to choose for the same task
Both sides belong to the Text Generation category. The conditionals below come from this site's directory records: first check which side's suitability fits your task and which side's exclusions affect you less; if both fit, decide by pricing basis and by how well platforms and formats line up. Prices appear only where a record has been verified; where it has not, no number is given.
DeepSeek
Fact sourceWhen to pick it Choose the DeepSeek API when per-million-token rates have to be costed out for a coding or reasoning workload and you can live with two rate bands, peak and off-peak, plus concurrency caps of 2500 and 500.
When to skip it The page says deepseek-v4-flash and deepseek-v4-flash-vision-exp are retired and now served by DeepSeek-V4.1-Flash at the Flash price, so integrations with a model name or version pinned in code have to change. Vision is flash-only and v4-pro is marked Not supported; if you want open weights to self-host, the closer record in this directory is Qwen, and if you need one long document read rather than a token-billed API, the closer record is Kimi. The page states no region and no commercial licence scope (unverified).
Verified price: Prices per 1M tokens — USD / 1M tokens. deepseek-flash: input (cache hit) off-peak 0.003, peak 0.006; input (cache miss) off-peak 0.15, peak 0.3; output off-peak 0.6, peak 1.2. deepseek-v4-pro: input (cache hit) off-peak 0.022, peak 0.044; input (cache miss) off-peak 0.66, peak 1.32; output off-peak 1.98, peak 3.96. off-peak is half of peak; peak hours UTC Mon-Fri 01:00-04:00 and 06:00-10:00, all other times and Chinese statutory holidays count as off-peak. (region: not stated, checked 2026-10-12). Annual prices are not converted to monthly.
Official sourceGrammarly
Fact sourceWhen to pick it Choose Grammarly when the same spelling and tone suggestions have to follow you across browser, desktop, and mobile apps, and you accept that full-sentence rewriting, plagiarism detection, and AI-generated-text detection all start at Pro.
When to skip it Free caps AI prompts at 100 per month and has no full-sentence rewriting or plagiarism detection; for line-by-line polishing and paraphrase the closer record in this directory is QuillBot, and for sentence-level alternative phrasings it is Wordtune. SAML single sign-on, SCIM, BYOK, and data loss prevention are Enterprise only, so check that line before procurement instead of inferring it from Pro; the page states no full commercial licence scope (unverified).
Verified price: Free 0 — USD / month; Pro 12 — USD (strikethrough, billing period not stated; page also writes Try for free and 0 USD payment today, a 7-day trial; 12 USD not treated as a standalone monthly price). Grammarly Subscription (embedded plan data): Monthly 30 — USD / month; Quarterly 60 — USD / 3 months; Annual 144 — USD / year; institutional 25 — USD / 1 month; flat EDU 50 — USD / 12 months; dynamic 180 — USD / 12 months (per-seat status not stated). Enterprise Contact Sales only, no amount. (region: not stated, checked 2026-10-12). Annual prices are not converted to monthly.
Official source| Attribute | ||
|---|---|---|
| Directory score | 4.6 / 5 | 4.6 / 5 |
| Pricing | Freemium | Freemium |
| Platforms | Not verified | Not verified |
| Models | Not verified | Not verified |
| Core features | deepseek-flash (V4.1-Flash) and deepseek-v4-pro, OpenAI and Anthropic base URL formats, 1M context, up to 384K maximum output | Spelling and grammar checking (all three tiers), Full-sentence rewriting and tone adjustment (Pro and above), Plagiarism and AI-generated-text detection (Pro and above) |
| Formats | Not verified | Not verified |
Cells marked "Not verified" in the table are fields the directory still keeps but did not check item by item against the official source this time; they are not verified facts. Please double-check them on the detail pages for DeepSeek, Grammarly.
Open a tool page for its official source link and directory record date.
Open the comparison tool to combine more tools →FAQ
How does DeepSeek pricing compare with Grammarly?+
DeepSeek: Verified price: Prices per 1M tokens — USD / 1M tokens. deepseek-flash: input (cache hit) off-peak 0.003, peak 0.006; input (cache miss) off-peak 0.15, peak 0.3; output off-peak 0.6, peak 1.2. deepseek-v4-pro: input (cache hit) off-peak 0.022, peak 0.044; input (cache miss) off-peak 0.66, peak 1.32; output off-peak 1.98, peak 3.96. off-peak is half of peak; peak hours UTC Mon-Fri 01:00-04:00 and 06:00-10:00, all other times and Chinese statutory holidays count as off-peak. (region: not stated, checked 2026-10-12). Annual prices are not converted to monthly. Grammarly: Verified price: Free 0 — USD / month; Pro 12 — USD (strikethrough, billing period not stated; page also writes Try for free and 0 USD payment today, a 7-day trial; 12 USD not treated as a standalone monthly price). Grammarly Subscription (embedded plan data): Monthly 30 — USD / month; Quarterly 60 — USD / 3 months; Annual 144 — USD / year; institutional 25 — USD / 1 month; flat EDU 50 — USD / 12 months; dynamic 180 — USD / 12 months (per-seat status not stated). Enterprise Contact Sales only, no amount. (region: not stated, checked 2026-10-12). Annual prices are not converted to monthly.
Which platforms do DeepSeek and Grammarly support?+
DeepSeek runs on "Not verified" (see the DeepSeek page); Grammarly runs on "Not verified" (see the Grammarly page). If you hand work between devices — draft on desktop, tweak on mobile — check that both ends of your usual setup are covered, and note that feature completeness can differ per platform.
Which file formats do DeepSeek and Grammarly support?+
DeepSeek supports "Not verified" (see the DeepSeek page); Grammarly supports "Not verified" (see the Grammarly page). Format coverage decides whether either tool slots into your existing asset and delivery pipeline, so align inputs and outputs before pairing them.
Should I pick DeepSeek or Grammarly?+
DeepSeek: Choose the DeepSeek API when per-million-token rates have to be costed out for a coding or reasoning workload and you can live with two rate bands, peak and off-peak, plus concurrency caps of 2500 and 500. Grammarly: Choose Grammarly when the same spelling and tone suggestions have to follow you across browser, desktop, and mobile apps, and you accept that full-sentence rewriting, plagiarism detection, and AI-generated-text detection all start at Pro.
Where does this comparison data come from, and how fresh is it?+
The directory record for DeepSeek is dated 2026-10-12 and for Grammarly 2026-10-12. Pricing models, platforms, models, features, and formats come from this site's directory records rather than live crawling. A pricing model is not an amount. Capabilities and prices change between versions, so re-check the official sources linked from each tool page before deciding.