Compare

GPT-6.1 Sol vs FLUX 3 Image Klein

Pricing per million tokens, context window, capabilities — pulled from each provider's public docs. All 2 are available via the same AIgateway OpenAI-compatible endpoint; flip the model string to switch.

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GPT-6.1 Sol
openai/gpt-6.1-sol
FLUX 3 Image Klein
black-forest-labs/flux-3-image-klein
Provider
OpenAI
Black Forest Labs
Family
FLUX
Modality
text
image
Context window
1,050,000 tok
—
Max output
128,000 tok
—
Released
2026-10-06
2026-10-16
License
Open-weight
Open-weight
Input price
$2.00 /1M
—
Output price
$10.00 /1M
—
Per image
—
$0.0090 /img
Tools
yes
—
Streaming
yes
—
Vision
yes
—
JSON mode
yes
—
Reasoning
yes
—
Prompt caching
—
—
Batch API
—
—
Try it
Open in playground →
View model →
GPT-6.1 Sol
openai/gpt-6.1-sol
Full spec →

GPT-6.1 Sol is OpenAI's newest Sol model, delivering near-Astra performance at a lower cost for complex coding, computer use, and professional work.

Strengths
  • General-purpose chat
  • Long context
  • Tool use
Use cases
ChatbotsContent generationAgentic workflows
FLUX 3 Image Klein
black-forest-labs/flux-3-image-klein
Full spec →

FLUX 3 Image Klein is Black Forest Labs' 5.6B-parameter image model for text-to-image, image editing, and multi-reference generation with up to 10 reference images. It supports native 4K output and bounding-box layout control.

Strengths
  • Text-to-image generation
  • Creative control
Use cases
Marketing assetsProduct mockupsConcept art

Compare with another

Gemini 4 Argon vs GPT-6.1 Sol
google/gemini-4-argon · openai/gpt-6.1-sol
Gemini 4 Argon vs FLUX 3 Image Klein
google/gemini-4-argon · black-forest-labs/flux-3-image-klein
Claude Sonnet 5.5 vs GPT-6.1 Sol
anthropic/claude-sonnet-5.5 · openai/gpt-6.1-sol
Claude Sonnet 5.5 vs FLUX 3 Image Klein
anthropic/claude-sonnet-5.5 · black-forest-labs/flux-3-image-klein
GPT-6.1 Sol vs Claude Opus 5.5
openai/gpt-6.1-sol · anthropic/claude-opus-5.5
GPT-6.1 Sol vs Grok 4.7
openai/gpt-6.1-sol · xai/grok-4.7
GPT-6.1 Sol vs Glm-5.3
openai/gpt-6.1-sol · zai-org/glm-5.3
GPT-6.1 Sol vs Kimi K3
openai/gpt-6.1-sol · moonshot/kimi-k3
GPT-6.1 Sol vs Qwen3.8-Max
openai/gpt-6.1-sol · alibaba/qwen3.8-max
SWITCH BETWEEN THEM

One key, all 2, one line different.

from openai import OpenAI

client = OpenAI(
    base_url="https://api.aigateway.sh/v1",
    api_key="sk-aig-...",
)

# GPT-6.1 Sol
client.chat.completions.create(
    model="openai/gpt-6.1-sol",
    messages=[{"role":"user","content":"hello"}],
)

# FLUX 3 Image Klein
client.chat.completions.create(
    model="black-forest-labs/flux-3-image-klein",
    messages=[{"role":"user","content":"hello"}],
)
Get an AIgateway keyRun an eval on these →