OpenAI (67 models) vs xAI (Grok) (11 models) - compared across composite scores, pricing, capabilities, and context windows.
| OpenAI | Score | vs | xAI (Grok) | Score |
|---|---|---|---|---|
| GPT-5.4 Pro | 92 | Grok 4.20 | 89 | |
| GPT-5.4 | 92 | Grok 4 | 88 | |
| GPT-5.2 Pro | 91 | Grok 4.20 Multi-Agent | 88 | |
| GPT-5.2-Codex | 90 | Grok 4.1 Fast | 78 | |
| GPT-5.2 | 90 | Grok 4.3 | 76 | |
| GPT-5.3-Codex | 89 | Grok 3 | 74 | |
| GPT-5 Pro | 89 | Grok 3 Beta | 74 | |
| GPT-5.1-Codex-Max | 88 | Grok 4 Fast | 73 | |
| GPT-5 Codex | 88 | Grok 3 Mini Beta | 63 | |
| GPT-5 | 88 | Grok 3 Mini | 51 | |
| GPT-5.3 Chat | 87 | Grok Code Fast 1 | 40 |
| Capability | OpenAI | xAI (Grok) | Leader |
|---|---|---|---|
Vision | 45/67 | 6/11 | OpenAI |
Reasoning | 37/67 | 9/11 | OpenAI |
Function Calling | 57/67 | 10/11 | OpenAI |
JSON Mode | 63/67 | 11/11 | OpenAI |
Web Search | 28/67 | 11/11 | OpenAI |
Streaming | 65/67 | 11/11 | OpenAI |
Image Output | 4/67 | 0/11 | OpenAI |
| Metric | OpenAI | xAI (Grok) |
|---|---|---|
| Cheapest Input (per 1M tokens) | $0.030 gpt-oss-20b | $0.200 Grok 4.1 Fast |
| Cheapest Output (per 1M tokens) | $0.140 | $0.500 |
| Most Expensive Input (per 1M tokens) | $150.00 o1-pro | $3.00 Grok 4 |
| Most Expensive Output (per 1M tokens) | $600.00 | $15.00 |
| Free Models | 2 | 0 |
| Max Context Window | 1.1M | 2.0M |
| Model | Score | Input $/M | Output $/M |
|---|---|---|---|
| GPT-5.4 Pro | 92 | $30.00 | $180.00 |
| GPT-5.4 | 92 | $2.50 | $15.00 |
| GPT-5.2 Pro | 91 | $21.00 | $168.00 |
| GPT-5.2-Codex | 90 | $1.75 | $14.00 |
| GPT-5.2 | 90 | $1.75 | $14.00 |
| GPT-5.3-Codex | 89 | $1.75 | $14.00 |
| GPT-5 Pro | 89 | $15.00 | $120.00 |
| GPT-5.1-Codex-Max | 88 | $1.25 | $10.00 |
| GPT-5 Codex | 88 | $1.25 | $10.00 |
| GPT-5 | 88 | $1.25 | $10.00 |
| GPT-5.3 Chat | 87 | $1.75 | $14.00 |
| GPT-5.1 | 87 | $1.25 | $10.00 |
| GPT-5.1-Codex | 87 | $1.25 | $10.00 |
| GPT-5.1-Codex-Mini | 87 | $0.250 | $2.00 |
| o3 Deep Research | 87 | $10.00 | $40.00 |
| o3 Pro | 87 | $20.00 | $80.00 |
| o3 | 87 | $2.00 | $8.00 |
| GPT-5.1 Chat | 87 | $1.25 | $10.00 |
| o4 Mini Deep Research | 81 | $2.00 | $8.00 |
| o4 Mini | 81 | $1.10 | $4.40 |
| Model | Score | Input $/M | Output $/M |
|---|---|---|---|
| Grok 4.20 | 89 | $1.25 | $2.50 |
| Grok 4 | 88 | $3.00 | $15.00 |
| Grok 4.20 Multi-Agent | 88 | $2.00 | $6.00 |
| Grok 4.1 Fast | 78 | $0.200 | $0.500 |
| Grok 4.3 | 76 | $1.25 | $2.50 |
| Grok 3 | 74 | $3.00 | $15.00 |
| Grok 3 Beta | 74 | $3.00 | $15.00 |
| Grok 4 Fast | 73 | $0.200 | $0.500 |
| Grok 3 Mini Beta | 63 | $0.300 | $0.500 |
| Grok 3 Mini | 51 | $0.300 | $0.500 |
| Grok Code Fast 1 | 40 | $0.200 | $1.50 |
Compare any two AI providers side-by-side.
xAI focuses on a concentrated portfolio where 80% of models have reasoning capabilities (8/10) and 100% support web search (10/10), while OpenAI's broader approach yields only 53% reasoning coverage (34/64) and 48% web search support (31/64). This specialization allows Grok 4.1 Fast to outperform GPT-5.4 by 8 points despite xAI's 54-model disadvantage.
OpenAI's 5,454x price range offers budget options starting at $0.110/M tokens (5x cheaper than xAI's minimum) but scales to enterprise models at $600/M, while xAI's narrow 30x range ($0.500-$15.00) targets mid-tier production workloads. For high-volume applications under 1M tokens/day, OpenAI's low-end models save $390+ daily, but xAI's consistent pricing simplifies budgeting for teams needing predictable costs.
Despite both providers offering vision in 50-66% of their models, OpenAI's 42 vision-capable models include 5 open source options for on-premise deployment, while xAI's 5 vision models are all proprietary with zero open source alternatives. OpenAI's approach serves both cloud and edge deployments, whereas xAI optimizes for API-first users who prioritize the 2.0M max context (nearly 2x OpenAI's 1.1M) over deployment flexibility.
xAI provides function calling in 90% (9/10) and web search in 100% (10/10) of models, likely offering both capabilities in at least 9 models, while OpenAI's 89% function calling coverage (57/64) paired with 48% web search (31/64) suggests maximum overlap of 31 models. For developers requiring both features, xAI's smaller catalog paradoxically offers more consistent capability pairing.
OpenAI's 2 free models represent a 3% freemium strategy targeting developers and students, while xAI's zero free tier with a $0.500/M minimum positions them exclusively for funded projects and enterprises. This aligns with their average scores: xAI's 59/100 average (10 points above OpenAI's 49/100) suggests they've pruned lower-performing models that OpenAI keeps accessible for experimentation.