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Unlock premium model access with balanced usage limits for regular practice.
Scale your creative work with generous premium access and longer conversations.
Generous base and premium headroom for intensive creative and professional work.
*** Monthly request allotments reset on the 1st of each month.
| Plan | Price | Premium requests* | Base requests* | Chat length** | Max message length | Max chats | Max projects | Chat imports |
|---|---|---|---|---|---|---|---|---|
| Explorer (Current) | $0 | N/A | 20 per day | 20 user messages max | 300 words | 5 | 1 | 0 |
| Builder | $3 | 100 per month*** | 1,000 per month*** | 250 user messages max | 5,000 words | 50 | 5 | 0 |
| Studio | $15 | 500 per month*** | 2,500 per month*** | 500 user messages max | 5,000 words | 200 | 10 | 0 |
| Aurora | $25 | 1,250 per month*** | 5,000 per month*** | Unlimited | 10,000 words | Unlimited | 25 | 100 |
| Pro | $100 | 4,000 per month*** | 20,000 per month*** | Unlimited | 10,000 words | Unlimited | 100 | 100 |
*** Monthly request allotments reset on the 1st of each month.
* Chat billing uses weighted request units. Model cost, input length, retrieved reads, and Canvas/tool context can raise what a turn consumes.
** Chat-length limits count user messages only, not assistant replies.
Read-aloud billing: OpenAI uses 1 base request per 250 characters, Grok uses 3 base requests per 250 characters, and ElevenLabs uses 2 premium requests per 250 characters. gpt-audio-mini in chat starts at 2 base requests before length multipliers.
The tables below list all 69 chat models in the live selector, with provider API reference pricing as we track it in the catalog (usually per 1M tokens). Subscription billing still uses weighted request units; see the plan comparison notes above for how turns are counted.
All prices shown are per million tokens unless otherwise noted. Serving gpt-4o profitably is challenging given OpenAI's pricing structure. We use summarization sparingly to enable longer conversations, but we will never route you to a different model disingenuously. With us, you always know which model you're using.
| Model | Premium | Input | Output |
|---|---|---|---|
| gpt-4o-2024-05-13 | ✓ | $5.00 / 1M tokens | $15.00 / 1M tokens |
| gpt-4o-2024-08-06 | ✓ | $2.50 / 1M tokens | $10.00 / 1M tokens |
| gpt-4o-2024-11-20 | ✓ | $2.50 / 1M tokens | $10.00 / 1M tokens |
| gpt-4o | ✓ | $2.50 / 1M tokens | $10.00 / 1M tokens |
| gpt-4o-mini | $0.15 / 1M tokens | $0.60 / 1M tokens | |
| gpt-3.5-turbo | $0.50 / 1M tokens | $1.50 / 1M tokens | |
| gpt-3.5-turbo-0125 | $0.50 / 1M tokens | $1.50 / 1M tokens | |
| gpt-3.5-turbo-1106 | $0.50 / 1M tokens | $1.50 / 1M tokens | |
| gpt-audio-mini | $0.60 / 1M tokens | $2.40 / 1M tokens | |
| gpt-audio-mini-2025-10-06 | $0.60 / 1M tokens | $2.40 / 1M tokens | |
| gpt-audio-mini-2025-12-15 | $0.60 / 1M tokens | $2.40 / 1M tokens | |
| gpt-5.4 | ✓ | $2.50 / 1M tokens | $15.00 / 1M tokens |
| gpt-5.4-mini | ✓ | $0.75 / 1M tokens | $4.50 / 1M tokens |
| gpt-5.4-nano | $0.20 / 1M tokens | $1.25 / 1M tokens | |
| gpt-5.3-codex | ✓ | $1.75 / 1M tokens | $14.00 / 1M tokens |
| gpt-5.3-chat-latest | ✓ | $1.75 / 1M tokens | $14.00 / 1M tokens |
| gpt-5.2-chat-latest | ✓ | $1.75 / 1M tokens | $14.00 / 1M tokens |
| gpt-5.2-2025-12-11 | ✓ | $1.75 / 1M tokens | $14.00 / 1M tokens |
| gpt-5.1 | ✓ | $1.25 / 1M tokens | $10.00 / 1M tokens |
| gpt-5.1-chat-latest | ✓ | $1.25 / 1M tokens | $10.00 / 1M tokens |
| gpt-5.1-codex | ✓ | $1.25 / 1M tokens | $10.00 / 1M tokens |
| gpt-5.1-codex-mini | $0.25 / 1M tokens | $2.00 / 1M tokens | |
| gpt-5 | ✓ | $1.25 / 1M tokens | $10.00 / 1M tokens |
| gpt-5-codex | ✓ | $1.25 / 1M tokens | $10.00 / 1M tokens |
| gpt-5-chat-latest | ✓ | $1.25 / 1M tokens | $10.00 / 1M tokens |
| gpt-5-mini | $0.25 / 1M tokens | $2.00 / 1M tokens | |
| gpt-5-nano | $0.05 / 1M tokens | $0.40 / 1M tokens | |
| gpt-4.1 | ✓ | $2.00 / 1M tokens | $8.00 / 1M tokens |
| gpt-4.1-mini | $0.40 / 1M tokens | $1.60 / 1M tokens | |
| gpt-4.1-nano | $0.10 / 1M tokens | $0.40 / 1M tokens | |
| o3 | ✓ | $2.00 / 1M tokens | $8.00 / 1M tokens |
| o4-mini | ✓ | $1.10 / 1M tokens | $4.40 / 1M tokens |
| o3-mini | ✓ | $1.10 / 1M tokens | $4.40 / 1M tokens |
All prices shown are per million tokens. Grok models offer competitive pricing with fast response times and specialized capabilities for reasoning and code generation. On just4o.chat, grok-4.20-beta-0309-non-reasoning is Premium and grok-4.20-beta-0309-reasoning is Premium+.
| Model | Premium | Input | Output |
|---|---|---|---|
| grok-3 | ✓ | $3.00 / 1M tokens | $15.00 / 1M tokens |
| grok-3-mini | $0.30 / 1M tokens | $0.50 / 1M tokens | |
| grok-4.20-beta-0309-reasoning | ✓ | $2.00 / 1M tokens | $6.00 / 1M tokens |
| grok-4.20-beta-0309-non-reasoning | ✓ | $2.00 / 1M tokens | $6.00 / 1M tokens |
| grok-4-fast-reasoning | ✓ | $0.20 / 1M tokens | $0.50 / 1M tokens |
| grok-4-fast-non-reasoning | $0.20 / 1M tokens | $0.50 / 1M tokens | |
| grok-4-1-fast-reasoning | ✓ | $0.20 / 1M tokens | $0.50 / 1M tokens |
| grok-4-1-fast-non-reasoning | $0.20 / 1M tokens | $0.50 / 1M tokens | |
| grok-code-fast-1 | ✓ | $0.20 / 1M tokens | $1.50 / 1M tokens |
All prices shown are per million tokens. We pass through Anthropic's pricing directly to you. Claude models offer excellent reasoning capabilities and are available to Studio and Aurora tier users.
| Model | Premium | Input | Output |
|---|---|---|---|
| claude-opus-4-6 | ✓ | $5.00 / 1M tokens | $25.00 / 1M tokens |
| claude-opus-4-5 | ✓ | $5.00 / 1M tokens | $25.00 / 1M tokens |
| claude-sonnet-4-6 | ✓ | $3.00 / 1M tokens | $15.00 / 1M tokens |
| claude-sonnet-4-5 | ✓ | $3.00 / 1M tokens | $15.00 / 1M tokens |
| claude-haiku-4-5 | ✓ | $1.00 / 1M tokens | $5.00 / 1M tokens |
All prices shown are per million tokens unless otherwise noted. Gemini 2.5 models offer state-of-the-art multipurpose capabilities with hybrid reasoning. Gemini 2.5 Pro requires Studio or Aurora tier, while Flash variants are available on all tiers.
| Model | Premium | Input | Output |
|---|---|---|---|
| gemini-2.5-pro | ✓ | $1.25 / 1M tokens | $10.00 / 1M tokens |
| gemini-2.5-flash | $0.30 / 1M tokens | $2.50 / 1M tokens | |
| gemini-2.5-flash-lite | $0.10 / 1M tokens | $0.40 / 1M tokens | |
| gemini-3-pro-preview | ✓ | $2 / 1M (<200k) · $4 / 1M (>200k) | $12 / 1M (<200k) · $18 / 1M (>200k) |
| gemini-3.1-pro-preview | ✓ | $2 / 1M (<200k) · $4 / 1M (>200k) | $12 / 1M (<200k) · $18 / 1M (>200k) |
| gemini-3.1-flash-lite-preview | $0.25 / 1M (text/image/video) · $0.50 (audio) | $1.50 / 1M tokens | |
| gemini-3-flash-preview | $0.50 / 1M tokens | $3.00 / 1M tokens |
* Gemini 2.5 Pro pricing varies by prompt size: $1.25/$2.50 input and $10.00/$15.00 output for prompts ≤200k tokens / >200k tokens respectively.
* Gemini 3 Pro Preview and 3.1 Pro Preview (1M/64k context, Jan 2025): $2/$4 input and $12/$18 output (including thinking tokens) for prompts ≤200k / >200k tokens respectively.
** Gemini 3.1 Flash-Lite Preview: $0.25/1M for text/image/video input, $0.50/1M for audio; output (including thinking) $1.50/1M. Base model; preview rate limits may apply.
All prices shown are per million tokens. We use Fireworks for DeepSeek. DeepSeek models via Fireworks offer strong reasoning and agent performance. Base models available on all tiers. Does not support web search or image input.
| Model | Premium | Input | Output |
|---|---|---|---|
| deepseek-v3p1 | $0.56 / 1M tokens | $1.68 / 1M tokens | |
| deepseek-v3p2 | $0.56 / 1M tokens | $1.68 / 1M tokens |
Per million tokens. Qwen 3.6 Plus is available through Fireworks serverless on just4o.chat as a base model on all tiers. It supports function calling and image input, but not web search.
| Model | Premium | Input | Output |
|---|---|---|---|
| qwen3p6-plus | $0.50 / 1M tokens | $3.00 / 1M tokens |
Cached input: qwen3p6-plus $0.10/1M. Fireworks also offers dedicated deployments for this model outside the shared serverless route.
Per million tokens. OpenAI gpt-oss series is available via Fireworks and Cerebras. gpt-oss-120b and gpt-oss-20b are base Fireworks models; gpt-oss-120b-fast is a Premium OSS Cerebras chat-completions variant for faster replies. It uses 1 premium request per send. Does not support web search or image input. gpt-oss-20b does not support function calling.
| Model | Premium | Input | Output |
|---|---|---|---|
| gpt-oss-120b | $0.15 / 1M tokens | $0.60 / 1M tokens | |
| gpt-oss-120b-fast | ✓ | $0.35 / 1M tokens | $0.75 / 1M tokens |
| gpt-oss-20b | $0.07 / 1M tokens | $0.30 / 1M tokens |
Per million tokens. Moonshot AI Kimi series via Fireworks. Premium models. Does not support web search. K2.5 supports image input.
| Model | Premium | Input | Output |
|---|---|---|---|
| kimi-k2-thinking | ✓ | $0.60 / 1M tokens | $2.50 / 1M tokens |
| kimi-k2p5 | ✓ | $0.60 / 1M tokens | $3.00 / 1M tokens |
Per million tokens. MiniMax M2.1 and M2.5 via Fireworks: strong coding, agentic tool use, and office work. 228B, 204k–196k context. Base models available on all tiers. Does not support web search or image input.
| Model | Premium | Input | Output |
|---|---|---|---|
| minimax-m2p1 | $0.30 / 1M tokens | $1.20 / 1M tokens | |
| minimax-m2p5 | $0.30 / 1M tokens | $1.20 / 1M tokens |
Per million tokens. Z.ai GLM models are available through Fireworks and Cerebras. glm-4p7 and glm-5 are Fireworks models; glm-4p7-fast is a Premium OSS Cerebras chat-completions variant. It uses 2 premium requests per send. Neither supports web search or image input.
| Model | Premium | Input | Output |
|---|---|---|---|
| glm-4p7 | ✓ | $0.60 / 1M tokens | $2.20 / 1M tokens |
| glm-4p7-fast | ✓ | $2.25 / 1M tokens | $2.75 / 1M tokens |
| glm-5 | ✓ | $1.00 / 1M tokens | $3.20 / 1M tokens |
Cached input: glm-4p7 $0.30/1M, glm-5 $0.20/1M. Cerebras currently lists glm-4p7-fast as a preview model.
Native just4o.chat models. There is no separate per-token API pass-through; usage is covered by your plan limits and request-weighting rules like other chat models.
| Model | Premium | Input | Output |
|---|---|---|---|
| echo | ✓ | — | — |
| echo-mini | — | — |