Model vs model
GPT-6 Luna vs DeepSeek V4.1 Flash
GPT-6 Luna and DeepSeek V4.1 Flash are both in llmwise. What each gets on every plan, what it reads, how it's served and what happens when its provider fails, from the catalog and the code that runs them.
Model prices and specs checked against OpenRouter's GPT-6 Luna page, OpenRouter's DeepSeek V4.1 Flash page.
Short answer
Both are everyday models: each message comes from Pro's 60 a day, so they cost the same. Otherwise, only GPT-6 Luna reads a PDF as the whole file.
GPT-6 Luna and DeepSeek V4.1 Flash on every plan
Whether the one-time free trial reaches each model, then each paid plan's messages on it.
| Plan | Price | GPT-6 Luna | DeepSeek V4.1 Flash |
|---|---|---|---|
| Free | $0 | In the one-time trial of 5 messages | In the one-time trial of 5 messages |
| Pro | $20 a month | 60 a day | 60 a day |
| Max | $50 a month | 120 a day | 120 a day |
| Ultra | $100 a month | 200 a day | 200 a day |
| Studio | $200 a month | 200 a day | 200 a day |
Prices don't include tax, which is added where it applies and shown before you pay. A paid plan's month is one allowance shared by every model, so each monthly count is the most you get if all of it goes to that model. It renews each billing period; everyday models refill daily at 00:00 UTC. Long chats count more per reply. How pricing works.
Every limit is published. Paid plans also have a monthly fair-use limit on AI cost: Pro $7.50, Max $20, Ultra $42, Studio $85. Using every message on your plan at typical sizes stays under it; very large messages and heavy research use it faster. Every limit, explained.
What differs
Messages on Pro
Both are everyday models: each message comes from Pro's 60 a day, so they cost the same.
Context window
Both take up to 1.05M tokens of context. A chat in llmwise holds up to 200k tokens, which fits in either, so the difference shows only through each maker's own API.
Images and PDFs
Both read images. DeepSeek V4.1 Flash gets a PDF's text rather than the file itself.
On Free
Both are in the free trial.
Where messages go
GPT-6 Luna: Sent to OpenAI directly. DeepSeek V4.1 Flash: Served through OpenRouter, only by hosts that don't store or train on prompts. The maker's own endpoint is never asked.
Fact by fact
| Fact | GPT-6 Luna | DeepSeek V4.1 Flash |
|---|---|---|
| Context window | 1.05M tokens | 1.05M tokens |
| Reads images | Yes | Yes |
| PDFs | Whole file | Text only |
| Reasoning | Yes | Yes |
| API price (September 2026) | $0.10 in / $0.50 out per million tokens | $0.17 in / $0.60 out per million tokens |
| A typical message at API prices (4,000 tokens in, 700 out) | $0.0008 | $0.0011 |
| A $10 top-up adds | Nothing: an everyday model's count is daily | Nothing: an everyday model's count is daily |
| Where a message goes | Sent to OpenAI directly. | Served through OpenRouter, only by hosts that don't store or train on prompts. The maker's own endpoint is never asked. |
| If the provider fails | If OpenAI fails before the reply starts (an overload, a server error, a dropped connection), llmwise sends the same request to GPT-6 Luna through OpenRouter instead. | When one host is down, OpenRouter moves the request to another host that meets the same rules. |
| Anthropic's safety fallback | Doesn't apply | Doesn't apply |
GPT-6 Luna or DeepSeek V4.1 Flash?
From the facts above, not from benchmarks: the rest is how their answers suit your work, which one chat can show you.
Pick GPT-6 Luna: it reads a PDF as the whole file, charts and scans included; it costs its maker less to run ($0.0008 a typical message at API prices), though in llmwise the count is the same.
Try GPT-6 Luna and DeepSeek V4.1 Flash on your own question
Start a chat on GPT-6 Luna and ask a real question from your work, with any files it needs.
Switch the model picker to DeepSeek V4.1 Flash and ask for its answer to the same question. It sees the whole chat, including GPT-6 Luna's answer.
Compare the two on what matters to you: accuracy, tone, length, how much you'd have to fix. If it's close, ask each a follow-up.
The badge by each model in the picker shows what a message uses before you send it.
Each model's page, the families, and other pairs
GPT-6 Luna vs DeepSeek V4.1 Flash is one pair of models. The page below covers the whole families.
- GPT-6 Luna: price, limits and messages on every plan
- DeepSeek V4.1 Flash: price, limits and messages on every plan
- DeepSeek vs GPT
- Gemini 3.8 Flash vs DeepSeek V4.1 Flash
- Every model-vs-model page
GPT-6 Luna is a GPT model; DeepSeek V4.1 Flash is a DeepSeek model.
Questions
Is GPT-6 Luna or DeepSeek V4.1 Flash cheaper in llmwise?
Both are everyday models: each message comes from Pro's 60 a day, so they cost the same. Every paid plan's monthly allowance is shared by all models, so each count is the most you get if it all goes to that model.
Can I try GPT-6 Luna and DeepSeek V4.1 Flash for free?
Yes: both are in the free trial of 5 messages.
Which has the bigger context window, GPT-6 Luna or DeepSeek V4.1 Flash?
Neither: both take 1.05M tokens. A chat in llmwise holds up to 200k tokens, which fits in either, so the difference shows only through each maker's own API.
Can I use GPT-6 Luna and DeepSeek V4.1 Flash in the same chat?
Yes. Pick GPT-6 Luna for one message and DeepSeek V4.1 Flash for the next; the second sees the whole chat, including the first one's answer.
Claude, GPT, Gemini, DeepSeek, Grok, Kimi, and GLM, in one chat.
See what a message costs before you send it. Free is 5 messages to try; sign in with an email link, no password or card.