Grok 4.3 vs Grok 4.6
Benchmark Performance
Available Benchmarks
| Benchmark | Grok 4.3 | Grok 4.6 |
|---|---|---|
| LMArena Agent Arenaagent-2026-08-31-011508720696 · outcome_score · leader | -18.8177% of row best · score · Grok 4.3; 95% CI [-20.43612107, -17.19188295]; sessions 82745; observations 1299547; rank 55 | 5.76100% of row best · score · Grok 4.6 (xHigh); 95% CI [4.47058991, 7.04827601]; sessions 15090; observations 1574671; rank 16 |
| LMArena Text Arenatext-2026-09-01-011508720696 · arena_rating · leader | 1,397.9797% of row best · rating · grok-4.3; 95% CI [1394.22069381, 1401.72787538]; votes 65024; rank 141 | 1,443.75100% of row best · rating · grok-4.6-high; 95% CI [1433.62910542, 1453.86294509]; votes 3453; rank 55 |
| LiveBench2026-06-25 · overall · leader | 69.2784% of row best · percent · grok-4.3 · 11,184 output tokens / case | 82.17100% of row best · percent · grok-4.6 · 16,154 output tokens / case |
| ToneBench2026-08-28-10-task-cd9819ab6e4d · overall_score · leader | 74.9186% of row best · points · Grok 4.3 (high) · 5,154 output tokens / case | 86.61100% of row best · points · Grok 4.6 · 15,575 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.
Technical Differences
Side-by-Side Facts
| Field | Grok 4.3 | Grok 4.6 |
|---|---|---|
| Developer | xAI | xAI |
| Family | Grok 4 | Grok 4 |
| Model | Grok 4.3 | Grok 4.6 |
| Version | Grok 4.3 | Grok 4.6 |
| Lifecycle | active | active |
| Released | 2026-06-17 | Unknown |
| Knowledge cutoff | Unknown | 2026-02-01 |
| Input modalities | Text, Image | Text, Image |
| Output modalities | Text | Text |
| Context window | 1,000,000 | 500,000 |
| 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, tools |
13 comparable fields · 4 material differences · Pair passes the primary-source comparison gate
Grok 4.3 Capabilities
Grok 4.6 Capabilities
Internal Comparison Graph
Related Comparisons
| A | Pair | B | Context |
|---|---|---|---|
Claude Fable 5.1Anthropic | vs | Grok 4.6xAI | cross-developer peersimage, text |
Claude Mythos 5.1Anthropic | vs | Grok 4.6xAI | cross-developer peersimage, text |
Grok 4.3xAI | vs | Grok 4.5xAI | family variantsimage, text |
Grok 4.3xAI | vs | family variantsimage, text | |
Grok 4.5xAI | vs | Grok 4.6xAI | 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 Sonnet 4.6Anthropic | vs | Grok 4.3xAI | cross-developer peersimage, text |
Grok 4.6xAI | vs | family variantsimage, text | |
| vs | Grok 4.3xAI | family variantsimage, text | |
| vs | Grok 4.6xAI | family variantsimage, text | |
Claude Fable 5Anthropic | vs | Grok 4.3xAI | cross-developer peersimage, text |
Primary Evidence
Sources and Freshness
Questions
Grok 4.3 vs Grok 4.6 FAQs
Is Grok 4.3 or Grok 4.6 better for coding?+
This comparison does not currently contain a protocol-matched coding benchmark for both Grok 4.3 and Grok 4.6, so Model Markets cannot name a coding leader from pricing, context size, or capability labels alone.
Which is cheaper, Grok 4.3 or Grok 4.6?+
Grok 4.3 is $1.25 and Grok 4.6 is $2.00 per million tokens, so Grok 4.3 is cheaper on this metric. Grok 4.3 is $2.50 and Grok 4.6 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 4.6?+
Grok 4.3 has the larger sourced context window. Grok 4.3 supports 1,000,000 and Grok 4.6 supports 500,000.
Which performs better in benchmarks, Grok 4.3 or Grok 4.6?+
Grok 4.6 leads the current overall benchmark count. The result uses 4 protocol-matched benchmarks from 3 publishers; it is not a universal quality score.
Can Grok 4.3 or Grok 4.6 be self-hosted?+
Both models have the same recorded self-hosting status: unsupported. Grok 4.3 is not marked open weight; Grok 4.6 is not marked open weight.
Can Grok 4.3 and Grok 4.6 understand images?+
Grok 4.3 is documented with image input; Grok 4.6 is documented with image input. This reflects supported input modalities, not vision quality.
Which can generate longer answers, Grok 4.3 or Grok 4.6?+
Neither has a larger sourced maximum output. Grok 4.3 is — and Grok 4.6 is —.
Do Grok 4.3 and Grok 4.6 support reasoning and tool use?+
Grok 4.3: reasoning, tool calling, and image input. Grok 4.6: 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 4.6?+
Grok 4.3 has 1 sourced provider route; Grok 4.6 has 1, a tie.
Which offers better value, Grok 4.3 or Grok 4.6?+
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.