GPT-5.6 Sol vs GPT-6 Sol

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Model 1

Model 2

Comparison	GPT-5.6 Sol `gpt-5.6-sol`	GPT-6 Sol `gpt-6-sol`
Type	Chat	Chat
Best for	Chat, writing, coding and reasoning tasks	Chat, writing, coding and reasoning tasks
TokenRex price	$4.00 in / $20.00 out per 1M tokens	$2.00 in / $10.00 out per 1M tokens
Cached input / 1M tokens	$0.40 per 1M tokens	$0.20 per 1M tokens
Cache write / 1M tokens	No extra fee	No extra fee
Cached output	Not offered · standard output rate applies	Not offered · standard output rate applies
Web search	$10.00 per 1K searches	$10.00 per 1K searches
Market price	$4.00 in / $20.00 out per 1M tokens	$2.00 in / $10.00 out per 1M tokens
Context window (provider)	1,050,000 tokens	—
Input token limit (provider)	Within the context window	Within the context window
Maximum output	128,000 tokens	—
Knowledge cutoff	Feb 16, 2026	—
Vendor input modalities	Text, Image	Not verified
Vendor output modalities	Text	Not verified
TokenRex endpoints	POST /v1/chat/completions	POST /v1/chat/completions
TokenRex input	Text, Image/PDF content through the chat bridge	—
TokenRex output	Text	—
Benchmarks
Benchmark evidence	2 source-linked results	—
FrontierCode v1.1 (Extended)	54.68% Cognition FrontierCode 1.1; GPT-5.6 Sol; medium effort; codex harness; Extended subset (150 tasks). Published weighted rubric score (new_score × 100), not the all-or-nothing pass rate; solution-source violations score zero. Source field new_score=0.5468. Publisher evaluation, not a TokenRex measurement; provider effort configuration is not a guarantee of the API's fixed thinking budget. Cognition · FrontierCode 1.1 original leaderboard	—
FrontierCode v1.1 (Main)	39.93% Cognition FrontierCode 1.1; GPT-5.6 Sol; medium effort; codex harness; Main subset (100 tasks). Published weighted rubric score (new_score × 100), not the all-or-nothing pass rate; solution-source violations score zero. Source field new_score=0.3993. Publisher evaluation, not a TokenRex measurement; provider effort configuration is not a guarantee of the API's fixed thinking budget. Cognition · FrontierCode 1.1 original leaderboard	—

No overall score, winner or cost-versus-score frontier is calculated without comparable, attributable benchmark evidence. Different test configurations appear separately. Vendor capabilities are distinct from TokenRex API support.

— means no published value or no matching capability. Provider token limits are not tested gateway guarantees; TokenRex media controls and response formats are listed separately.

GPT-5.6 Sol

Sources and verification

Provider specifications describe the upstream model, not a guarantee of every feature through TokenRex. Prices come from the enabled catalog; benchmark results belong to the exact tested model.

Provider model specifications
Vendor-reported
Last checked 2026-10-06
Cognition · FrontierCode 1.1 original leaderboard
Third-party report
Last checked 2026-10-07

Research notes (1)

Published provider limits; maximum-capacity requests have not been independently exercised through TokenRex. Thinking-level variants use the same provider model; reasoning and answer tokens share the output budget.

GPT-6 Sol

Sources and verification

Provider specifications describe the upstream model, not a guarantee of every feature through TokenRex. Prices come from the enabled catalog; benchmark results belong to the exact tested model.

No attributable specifications verified for this exact model yet.

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