The Atlas · column E ($1–3) · row 4 (256K–1M)
GRIDE4 Models at $1–3 per 1M input with 256K–1M tokens of context
11 models · 3 creatorsChecked 10 Oct 2026
11 models cost between $1.25 and $2.00 per 1M input tokens and hold 256K–1M tokens of context. The cheapest on input is GPT-5 at , tied with 2 others; Grok 4.5 has the lowest output price at $6.00. A request that fills each model’s window costs $0.42–$1.02 here, because windows differ within a square.
$1.25
observed We measured
- Source
- Our catalogue
- Retrieved
- 17 Aug 2026
Ask an AI about this pageGChatGPTCClaudePPerplexityGeGeminiXGrok
Cite
Cite this page
ModelsAtlas. “Models at $1–3 per 1M input with 256K–1M tokens of context”. Retrieved 10 Oct 2026. https://modelsatlas.com/atlas/e4
Models in E4
Cheapest available standard-tier offer · USD per 1M tokens
| Model | Input | Output | Context | Listed | |
|---|---|---|---|---|---|
| GPT-5OpenAI | $1.25 | $10.00 | 400,000 | batch | Alternatives |
| GPT-5.1OpenAI | $1.25 | $10.00 | 400,000 | batch | Alternatives |
| GPT-5.1-CodexOpenAI | $1.25 | $10.00 | 400,000 | — | Alternatives |
| Mistral Medium 3.5Mistral AI | $1.50 | $7.50 | 262,144 | batch | Alternatives |
| GPT-5.2OpenAI | $1.75 | $14.00 | 400,000 | batch | Alternatives |
| GPT-5.2-CodexOpenAI | $1.75 | $14.00 | 400,000 | — | Alternatives |
| GPT-5.3-CodexOpenAI | $1.75 | $14.00 | 400,000 | — | Alternatives |
| Grok 4.5xAI | $2.00 | $6.00 | 500,000 | — | Alternatives |
| Grok 4.6xAI | $2.00 | $6.00 | 500,000 | — | Alternatives |
| Grok 4.7xAI | $2.00 | $6.00 | 500,000 | — | Alternatives |
| Mistral Large 3 2512Mistral AI | $2.00 | $6.00 | 262,144 | batch | Alternatives |
What a window-filling request costs here
One prompt that fills the model’s context window plus up to 4,000 output tokens · Σ derived
Arithmetic from the listed standard-tier rates, not a quote; the cheapest list price is not always the cheapest full-window request.
Neighbouring squares
One step cheaper, pricier, smaller or larger
← cheaper4GRIDD4$0.30–1 per 1M input, 256K–1M context: Qwen3 Coder 480B A35B, Qwen3.6 27B and 2 more.pricier →2GRIDF4$3–10 per 1M input, 256K–1M context: GPT Chat Latest and GPT-5.4 Image 2.↓ smaller8GRIDE3$1–3 per 1M input, 128–256K context: Claude Haiku 4.5, Grok Build 0.1 and 6 more.↑ larger12GRIDE5$1–3 per 1M input, 1M context: Gemini 2.5 Pro Preview 06-05, Grok 4.3 and 10 more.
Questions about square E4
What is the cheapest AI model with 256K–1M tokens of context at $1–3 input?
GPT-5 at $1.25 per 1M input tokens and $10.00 output, tied with 2 others. The other 10 in E4: GPT-5.1, GPT-5.1-Codex, Mistral Medium 3.5, GPT-5.2, GPT-5.2-Codex and 5 more.
Which E4 model is cheapest for a request that fills its context window?
Mistral Medium 3.5, at about $0.42 for a prompt that fills its 262K window plus its output. The dearest of the 11 is Grok 4.7 at $1.02. The cheapest list price is not always the cheapest full-window request, because windows differ within a square.
Are any E4 models open-weight?
None of the 11 is marked open-weight in our records.
What does grid reference E4 mean?
E is the price column ($1–3 per 1M input tokens) and 4 is the context row (256K–1M). Models in the same square are like-for-like on price and context only; the grid says nothing about quality.
Keep going in your AI
Opens with this page as the source. We add nothing else to the prompt.
- What is the cheapest AI model with 256K–1M tokens of context at $1–3 input?
- Which E4 model is cheapest for a request that fills its context window?
- Are any E4 models open-weight?