Grok 4.3 vs Grok 4.5
At a Glance
| Compare | Grok 4.3xAI | Grok 4.5xAI |
|---|---|---|
| Pricing and Limits | ||
| Input priceFrom · USD / 1M tokens | $1.25Xai ↗ · Sep 3, 2026 | $2.00Xai ↗ · Sep 3, 2026 |
| Output priceFrom · USD / 1M tokens | $2.50Xai ↗ · Sep 3, 2026 | $6.00Xai ↗ · Sep 3, 2026 |
| Context windowMaximum documented tokens | 1,000K | 500K |
| Model facts checked | Sep 3, 2026View model evidence → | Sep 3, 2026View model evidence → |
Token prices are the lowest available sourced USD rates; input and output may use different providers. Cost ranking estimates output spend on LiveBench, not a full request bill. Ranking methodology →
Available Benchmarks
| Benchmark | Grok 4.3 | Grok 4.5 |
|---|---|---|
| LMArena Search Arenasearch-2026-10-13-a64ca3b12b6e · arena_rating · leader | 1,165.8196% of row best · rating · grok-4.3; 95% CI [1161.07351221, 1170.53848666]; votes 128393; rank 30 | 1,215.94100% of row best · rating · grok-4.5; 95% CI [1210.07957437, 1221.79459071]; votes 76458; rank 13 |
| LMArena Text Arenatext-2026-10-15-a64ca3b12b6e · arena_rating · leader | 1,396.9296% of row best · rating · grok-4.3; 95% CI [1393.31445966, 1400.53298228]; votes 71347; rank 158 | 1,447.97100% of row best · rating · grok-4.5; 95% CI [1443.63647354, 1452.30434473]; votes 39896; rank 56 |
| LMArena Vision Arenavision-2026-10-09-a64ca3b12b6e · arena_rating · leader | 1,229.2495% of row best · rating · grok-4.3; 95% CI [1223.34663531, 1235.13960477]; votes 27037; rank 78 | 1,288.17100% of row best · rating · grok-4.5; 95% CI [1280.98331591, 1295.35286239]; votes 11764; rank 31 |
| LiveBench2026-06-25-90f8d44da965 · overall · leader | 69.2787% of row best · percent · grok-4.3 · 11,184 output tokens / case | 80.01100% of row best · percent · grok-4.5 · 10,517 output tokens / case |
| ToneBench2026-10-17-10-task-e9c76358afb2 · overall_score · unverified | 65.8085% of row best · points · Grok 4.3 (high) · 7,563 output tokens / case | 77.82100% of row best · points · Grok 4.5 (high) · 2,775 output tokens / case |
| Overall ResultCounted from the protocol-matched rows above | 0 benchmark wins | 4 benchmark winsOverall lead |
Third-party benchmark Only like-for-like primary-publisher results are shown; raw scores, relative scores, configuration, and token spend remain visible.
Side-by-Side Facts
| Field | Grok 4.3 | Grok 4.5 |
|---|---|---|
| Developer | xAI | xAI |
| Family | Grok 4 | Grok 4 |
| Model | Grok 4.3 | Grok 4.5 |
| Version | Grok 4.3 | Grok 4.5 |
| Lifecycle | active | active |
| Released | 2026-06-17 | 2026-07-16 |
| Knowledge cutoff | Unknown | Unknown |
| Input modalities | Text, Image | Text, Image |
| Output modalities | Text | Text |
| Context window | 1,000K | 500K |
| Total parameters | Unknown | Unknown |
| Active parameters | Unknown | Unknown |
| License | Unknown | Unknown |
| Open weights | No | No |
| API available | Yes | Yes |
| Self-hostable | No | No |
| Provider access | Xai (Standard) | Xai (Standard) |
| Capabilities | chat, generation, reasoning, structured_outputs, tools | chat, generation, reasoning, structured_outputs, tools |
Grok 4.3 Capabilities
Grok 4.5 Capabilities
Related Comparisons
All image comparisons →| A | Pair | B | Context |
|---|---|---|---|
Grok 4.3xAI | vs | Grok 4.6xAI | family variantsimage, text |
Claude Mythos 5.1Anthropic | vs | Grok 4.3xAI | cross-developer peersimage, text |
Claude Sonnet 5Anthropic | vs | Grok 4.3xAI | cross-developer peersimage, text |
Grok 4.3xAI | vs | family variantsimage, text | |
Claude Opus 4.6Anthropic | vs | Grok 4.3xAI | cross-developer peersimage, text |
Claude Opus 4.7Anthropic | vs | Grok 4.3xAI | cross-developer peersimage, text |
Claude Opus 4.8Anthropic | vs | Grok 4.3xAI | cross-developer peersimage, text |
Claude Opus 5Anthropic | vs | Grok 4.3xAI | cross-developer peersimage, text |
Claude Sonnet 4.6Anthropic | vs | Grok 4.3xAI | cross-developer peersimage, text |
 GPT-5.4OpenAI | vs | Grok 4.3xAI | cross-developer peersimage, text |
| vs | Grok 4.3xAI | family variantsimage, text |
Primary Evidence
Sources and Freshness
Questions
Grok 4.3 vs Grok 4.5 FAQs
Is Grok 4.3 or Grok 4.5 better for coding?+
This comparison does not currently contain a protocol-matched coding benchmark for both Grok 4.3 and Grok 4.5, so Model Markets cannot name a coding leader from pricing, context size, or capability labels alone.
Which is cheaper, Grok 4.3 or Grok 4.5?+
Grok 4.3 is $1.25 and Grok 4.5 is $2.00 per million tokens, so Grok 4.3 is cheaper on this metric. Grok 4.3 is $2.50 and Grok 4.5 is $6.00 per million tokens, so Grok 4.3 is cheaper on this metric.
Which has a larger context window, Grok 4.3 or Grok 4.5?+
Grok 4.3 has the larger sourced context window. Grok 4.3 supports 1,000,000 tokens and Grok 4.5 supports 500,000 tokens.
Which performs better in benchmarks, Grok 4.3 or Grok 4.5?+
Grok 4.5 leads the current overall benchmark count. The result uses 4 protocol-matched benchmarks from 2 publishers; it is not a universal quality score.
Can Grok 4.3 or Grok 4.5 be self-hosted?+
Both models have the same sourced self-hosting status: unsupported. Grok 4.3 is not marked open weight; Grok 4.5 is not marked open weight.
Can Grok 4.3 and Grok 4.5 understand images?+
Grok 4.3 is documented with image input; Grok 4.5 is documented with image input. This reflects supported input modalities, not vision quality.
Which can generate longer answers, Grok 4.3 or Grok 4.5?+
Neither model has a sourced maximum output in this comparison, so a larger limit cannot be determined.
Do Grok 4.3 and Grok 4.5 support reasoning and tool use?+
Grok 4.3: reasoning, tool calling, and image input. Grok 4.5: reasoning, tool calling, and image input. Feature support does not establish relative quality.
Which is available from more inference providers, Grok 4.3 or Grok 4.5?+
Grok 4.3 has 1 sourced provider route; Grok 4.5 has 1, a tie.
Which offers better value, Grok 4.3 or Grok 4.5?+
There is no universal value winner. Compare the input and output prices above with the matched benchmark result for your workload: cheaper tokens can be offset by different quality, token usage, latency, or provider availability.