Provider comparison · Updated 10 Oct 2026
OpenAI vs xAI
44 models vs 7 models
xAI is cheaper at the median: $1.25 against $2.00 per 1M input tokens across paid models, about 1.6× less. Its cheapest paid model, Grok Build 0.1 ($1.00), compares with gpt-oss-20b ($0.02) at OpenAI. OpenAI lists 44 models; xAI lists 7 models.
Ask an AI about this pageGChatGPTCClaudePPerplexityGeGeminiXGrok
Cite
Cite this page
ModelsAtlas. “OpenAI vs xAI”. Retrieved 10 Oct 2026. https://modelsatlas.com/compare-providers/openai/xai
At a glance
Standard tier · highlighted = better
OpenAI
xAI
Models listed
44
7
Cheapest paid input / 1M
$0.02
$1.00
Median paid input / output
$2.00 / $10.00
$1.25 / $2.50
Highest input / 1M
$30.00
$2.00
Largest context
1.05M
2M
Models with a batch tier
20 of 44
1 of 7
Open-weight models
8
0
Free models
0
0
Vision models listed
3
0
Audio models listed
4
0
Costs for real workloads
Cheapest paid model from each provider that fits the job · monthly
Derived from standard-tier prices, 30 days. “Fits the job” means the context window holds the prompt and reply. Excludes batch and caching.
Cheapest model for each capability
Input / output per 1M
| Capability | OpenAI | xAI |
|---|---|---|
| 1M context | GPT-6 Luna $0.10 / $0.50 | Grok 4.20 $1.25 / $2.50 |
Line-up by price tier
Paid models · input per 1M
| Tier | OpenAI | xAI |
|---|---|---|
| Flagship $3+ | GPT-4 $30.00 o1 $15.00 GPT-6 Astra $10.00 GPT-4 Turbo $10.00 GPT-5 Image $10.00 +4 more | None listed |
| Mid $0.50–$3 | GPT-3.5 Turbo $0.50 o3 Mini High $1.10 o4 Mini $1.10 o4 Mini High $1.10 GPT-5 $1.25 +16 more | Grok Build 0.1 $1.00 Grok 4.20 $1.25 Grok 4.20 Multi-Agent $1.25 Grok 4.3 $1.25 Grok 4.5 $2.00 +2 more |
| Budget under $0.50 | gpt-oss-20b $0.02 gpt-oss-120b $0.03 gpt-oss-safeguard-20b $0.08 GPT-6 Luna $0.10 GPT-5.6 Luna $0.20 | None listed |
| Open weights any price | None listed | None listed |
Questions
Is OpenAI or xAI cheaper?
xAI at the median: $1.25 against $2.00 for OpenAI per 1M input tokens. Median is across each provider's paid standard-tier models, so a provider with many small models can look cheaper than its flagship is.
Which provider has more models?
OpenAI lists more: OpenAI 44, xAI 7. Counts are models with a page in our catalogue.
Do both offer batch pricing?
OpenAI: 20 models list a batch tier. xAI: 1 model list a batch tier. Where a model lists both, batch is a median 50% of standard for OpenAI and 80% for xAI.
Which has the larger context window?
xAI has the larger: GPT-5.4 (1.05M tokens) at OpenAI, Grok 4.20 (2M) at xAI.
Does either provider offer open-weight models?
OpenAI: 8 open-weight models. xAI: none marked open-weight.
Does either have free models?
OpenAI: none listed at no per-token charge. xAI: none.
Browse more providers
Keep going in your AI
Opens with this page as the source. We add nothing else to the prompt.
- Is OpenAI or xAI cheaper?
- Which provider has more models?
- Do both offer batch pricing?