InferIndex · https://inferindex.dev/en/compare/openai/gpt-5.5/vs/x-ai/grok-4.5
GPT-5.5 costs from $11.25 per million tokens and Grok 4.5 from $3.00 (at a 3:1 input:output mix): the cheapest price for each; prices checked on .
Each model's lowest blended price, per 1M tokens, across every provider we track.
| Model | Quality rank from public evaluations. 1 = best. | Coding quality rank from public evaluations. 1 = best. | Lowest blended price, $ per 1M tokens. Green background: the most favourable value of each column. | Input price of the cheapest offer, per 1M tokens | Output price of the cheapest offer, per 1M tokens | The provider's published policy says the text you send is not used to train models. We only show what is published; we can't check it ourselves. | For 2,000 input tokens and 500 output tokens per request, 1,000 requests a day, at the cheapest offer for that workload. | Offers | Providers | The maximum amount of text, counted in tokens, the model can take in and write in a single request. Past this limit, the request is refused or cut. |
|---|---|---|---|---|---|---|---|---|---|---|
| Rank 29 of 84 · score 84.7/100 · Nov 14, 2026 | Rank 40 of 52 · score 51.6/100 · Nov 14, 2026 | Most expensive offer · $3.40. The highest blended price among comparable offers: one price per provider (its cheapest route), standard tier, current prices only. Priority tiers and prices converted from points are not counted. Green background: the most favourable value of each column., most favourable value of the column | $2.00, most favourable value of the column | $6.00, most favourable value of the column | An offer with no training on prompts at the lowest price. at NanoGPT | $210.00, most favourable value of the columnat AtlasCloud via hosted API | 23 | 16 | 500k | |
| Rank 12 of 84 · score 92.9/100 · Nov 14, 2026, most favourable value of the column | Rank 38 of 52 · score 52.8/100 · Nov 14, 2026, most favourable value of the column | Most expensive offer · $12.38. The highest blended price among comparable offers: one price per provider (its cheapest route), standard tier, current prices only. Priority tiers and prices converted from points are not counted. | $5.00 | $30.00 | An offer with no training on prompts at the lowest price. | $750.00at OpenAI | 41 | 19, most favourable value of the column | 1M |
Green background: the most favourable value of each column.
Cheaper, similar quality
vs GPT-5.5Score within 3 points out of 100 in the same quality board, blended price at least 10% lower.OverallRank 12 of 84 · score 92.9/100 · Nov 14, 2026
| Model | Qualityrank | Gappts | Blended$/1M | Saving% | |
|---|---|---|---|---|---|
| Rank 19 of 84 · score 89.9/100 · Nov 14, 2026 | −3.0 | 2.00 | 82 | Compare | |
| Rank 16 of 84 · score 91.7/100 · Nov 14, 2026 | −1.2 | 2.10 | 81 | Compare | |
| Rank 17 of 84 · score 90.7/100 · Nov 14, 2026 | −2.2 | 2.57 · Platform fee included (5.5%) | 77 | Compare | |
| Rank 4 of 84 · score 95.3/100 · Nov 14, 2026 | +2.4 | 3.20 | 72 | Compare | |
| Rank 6 of 84 · score 94.9/100 · Nov 14, 2026 | +2.0 | 4.00 | 64 | Compare |
CodeRank 38 of 52 · score 52.8/100 · Nov 14, 2026
| Model | Coderank | Gappts | Blended$/1M | Saving% | |
|---|---|---|---|---|---|
| Rank 36 of 52 · score 53.5/100 · Nov 14, 2026 | +0.7 | 0.84 | 93 | Compare | |
| Rank 34 of 52 · score 55.0/100 · Nov 14, 2026 | +2.2 | 0.90 | 92 | Compare | |
| Rank 40 of 52 · score 51.6/100 · Nov 14, 2026 | −1.2 | 3.00 | 73 | Compare | |
| Rank 35 of 52 · score 54.9/100 · Nov 14, 2026 | +2.1 | 5.63 | 50 | Compare | |
| Rank 39 of 52 · score 52.3/100 · Nov 14, 2026 | −0.5 | 8.00 | 29 | Compare |
Prices as of Nov 15, 2026, 3:55 AM UTCSame rules as the API's /cheapest route. The monthly estimate uses the cheapest offer for that workload.